Find cheap flights from Denver to Boston

DEN - BOS

Find cheap flights from Denver to Boston

Search hundreds of travel sites at once for deals on flights to Boston. Bundle your flight + hotel and save!

Round-trip
Economy
Denver (DEN)
Boston Logan Intl
Thu 9/23
Thu 9/30
Any month
Bundle with KAYAK |
Include hotels

Good to know

Low season

SeptemberBest time to beat the crowds with an average 16% drop in price.

High season

DecemberMost popular time to fly with an average 31% increase in price.

Average price round-trip

$268(avg. price over the last 2 weeks)

Good deal round-trip

$186or less

Good deal one-way

$119or less

When to book flights from Denver to Boston

Estimated round-trip price
Average price per month
Flight prices as travel date approaches

Top tips for finding a cheap flight

  • Looking for a cheap flight? 25% of our users found flights on this route for $119 or less one-way and $186 or less round-trip.
  • The cheapest flight from Denver to Boston was found 77 days before departure, on average.
  • Book at least 3 weeks before departure in order to get a below-average price.
  • High season is considered to be November, December and January. The cheapest month to fly is September.
  • Morning departure is around 13% cheaper than an evening flight, on average*.
  • JetBlue and United Airlines both offer nonstop flights from Denver Intl (DEN) to Boston Logan Intl (BOS). Alternatively, Sun Country Air and Frontier also have great flight deals from Denver to Boston, but with one layover either in Miami (MIA) or Minneapolis St Paul (MSP).
  • Denver International Airport is just a short drive away from downtown Denver, 25 miles away. The airport is very well-connected to downtown by public transportation, and you can also opt for a quick taxi instead.
  • Once you’re through security you will find everything you need to keep you comfortable while you wait for your flight from free charging stations for all your devices, free Wi-Fi to stay connected, two lounges (United Club East and Delta Sky Club), nursing rooms, prayer halls, and an on-site pet resort.
  • Boston Logan International Airport, also known as Massport, has four passenger terminals, A, B, C, and E, and are separated from each other. Each terminal has free ground transportation, Wi-Fi, and food and concession stands.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for booking flights from Denver to Boston

Which airlines have a flexible cancellation policy for flights from Denver to Boston due to COVID-19?

Are there on-site hotels at Boston Airport?

What are my options to get to the Denver Airport by public transportation?

What are some good tips for getting through Denver Airport quickly?

What are my options to get to downtown Boston from the airport via public transportation?

How long does a flight from Denver to Boston take?

How many flights are there between Denver and Boston?

Do I need a passport to fly between Denver and Boston?

Which airlines fly most frequently between Denver and Boston?

What’s the cheapest day of the week to fly from Denver to Boston?

Which airports will I be using when flying from Denver to Boston?

How does KAYAK find such low prices on flights from Denver to Boston?

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Denver to Boston?

What is the Hacker Fare option on flights from Denver to Boston?

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Denver to Boston?

Top airline flying Denver Intl to Boston Logan Intl

Scores according to KAYAK customer reviews

5.6
Spirit Airlines
Overall score based on 62,430 reviews
6.1
Boarding
5.4
Comfort
6.5
Crew
4.6
Entertainment
4.7
Food
Airline reviews

"This is the worst airline ever! Do not fly this airline if you want to actually get to your destination on time. Multiple delays, cancellations, and long lines. Very poor customer service."

Cons: "Seats are way to small. Crew was rude. Flight was 2-1/2 hrs late"

Pros: "Getting home safely."
Cons: "Getting home on time."

Pros: "Not at all"
Cons: "Your rules! Spirit allows 1 carry on? Sucks. You have to bay $50 to check A single bag? Sucks and too expensive why don’t you try to be like Jet Blue and make it nice for us flyers. Spirit blows"

Cons: "Constant meaningless delay’s."

Pros: "I like better if the food is free"

Pros: "The seats were bigger than the first flight of the day."
Cons: "There were unused rows. Why do they always have people grouped together? We're supposed to be keeping a distance. This is not an isolated incident."

Pros: "Arrived early!"
Cons: "wish seat could tilt back"

Pros: "It was smooth."

Cons: "Too crowded given the current situation"

Pros: "Nothing."
Cons: "My flight was delayed 7 hours. I never recieved an e-mail letting me know of this even though I gave my email when I bought the tickets so that I would get updates on the flight. I checked the flight status before leaving my house at 2am and the flight was still on time. After driving 2 hours to the airport and going through security I found out that my flight was being delayed 7 hours and no representative was even at the gate to speak with. All I was given was one $14 meal voucher which didn’t even cover a full meal at the airport. It’s told that the issue was mechanical but I later found out that te first flight had been over booked and the 1pm flight didn’t have enough people on it so they made everyone on at 6am flight wait until 1pm to fly out. Once on the plane, the seats were hard and uncomfortable and the plane was cold. I am extremely disasiflied and will never use Spirit again."

Pros: "Crew were jovial and witty"
Cons: "Being charged for every ounce of baggage. Nightmare queues at bag drop and security"

Pros: "Crew were nice"
Cons: "Late"

Pros: "Not much except the quick boarding but that's because no one brings a checked bag which is a HUGE negative."
Cons: "First of all the people who work at spirit in Florida are very rude. Second it is a major scam that they advertise cheap flights. Their flights are cheap because they charge you for your carry on. $57 to carry on a small roller bag and $50 to check your bag. To me that is unbelievable. There is plenty of space and it makes no sense. They also won't even give you a free cup of water. Flying naturally dehydrates your body. I'm surprised we don't hear about more people getting sick or passing out on their flights! I just couldn't believe for a 3 hr flight I'd have to buy a water bottle. In the end just was not worth the cheaper flight price. I will never fly spirit again."

Cons: "There was a medical emergency on board that had everyone questioning what was going on. We all heard a scream, that of course freaked all of us out. Nobody was telling us what was going on or asked for a Doctor on board. We even landed without knowing what happened. Because most of the staff was tending to this issue, when it came time to throw out trash, the flight attendant was swiftly walking down the plane calling out "trash". I didn't even have enough time to hand him mine before he passed our row without looking. The flight was also extremely turbulent. And a word of the wise for future Spirit purchasers: the seats do not recline AND there is no on board entertainment."

Cons: "During a difficult weather situation, Spirit was absolutely useless and left us stranded for a week. With storms on the East Coast, Spirit cancelled flights two days in a row (as did all other airlines). However, with Spirit, the website was useless for rebooking ourselves, and there were so few representatives at the airport and to reach a rep on the phone that we waited several hours just to be able to rebook at the airport. In the end, Spirit could not get us on another flight out for 7 more days. Causing extreme additional expense to me and my travel partner. I will never risk flying Spirit again."

Pros: "nothing"
Cons: "the flight was delayed again and again for over 18 hours even as other planes from other airlines took off around us. at one point we boarded the flight and sat 10 feet from the gate for over an hour before they returned us to thr gate and made us disembark. for another set of delays we were told that the person supposed to tow the plane had lost his access badge and another person had to drive in from home to do the work. other than this, the gate staff gave the passengers limited to no information. no amenities were provided to delayed passengers (no snacks, accommodations, etc). plus, the terminal had only one women's restroom with only two stalls, one of which was frequently out of toilet paper."

Pros: "The flight to Fort Lauderdale was outstanding in all respects, including carrying on our bags."
Cons: "The Spirit check-in for the flight back (2/27/17#616) was degrading, confused, and expensive: the worst ever in a long experience flying worldwide and our last with Spirit. After making them aware of a hip transplant, we were directed to the wrong location eliciting an rude expletive; redirected, we were told our carry-on was too big and charged $50. to check it. I had carried it on at Logan and with Delta 2/8 and 2/10) and many other airlines before. On board people all around us carried on bags similar in size to our checked bag."

Pros: "Friendly employees"
Cons: "Spirit canceled our flight and their only solution was refund or wait 3 days until they could get us home. Had to spend thousands to rebook to get us home the next day on another again. Never again."

Cons: "They told me I needed to spend a lot of money to sit with my 6 and 7 year old children. A LOT of money. Without spending extra, we would be assigned random seats. I didn't believe them because it breaks FAA rules, , so I checked in without our. Basing the seats and I was already seated with my kids. They obviously lied and tried for the upsell. They changed my flight 4 times and never sent a notification Website is intentionally deceptive and horribly designed. I tried to purchase bags and it checked me in (without my consent), tried to upsell me on a credit card 4 times, tried to upsell and confuse me about purchasing priority boarding, Only one working bathroom on a full flight. They deceived everyone at the gate and said a carry on was 100 dollars but failed to mention that it only applied to carry ons over a certain size. Worst company I've ever dealt with. Deceptive."

Pros: "i have flown spirit multiple times out of phoenix in all kinds of weather and not once has it ever taken off on time! once the airline attendant even yelled at the passengers upon arrival at the gate like we were all children. I decided to check the status today instead of waiting in the airport for four hours and yes--- again it was delayed one hour and then two hours. so I planed accordingly and planned to be at the airport 1.5 hours ahead of the revised flight time. then they changed the flight time again and now I've missed my flight. this airline is absolutely the worst and I have flown domestically and internationally for over 35 years. I'm done with you spirit!"

Pros: "Totally so mad at check in on line 24 hours ahead of time - found out one piece of checked bags is $40, a carry on was another $20 and seat assignement was yet another fee. All this after buying a ticket! We had no idea there were so many other fees. The airport was was out of our way and we only booked the flight because the fare was lower. When we found at AT CHECK IN, 24 hours ahead of time about all the extr fees, we rebooked on another airline and said forget this airline, what a rip off! Never again will book this airline with all those hidden fees. It was excessive and not mentioned till check in. Bad business model!!"

Pros: "Clean and friendly staff"
Cons: "NTR"

Cons: "I paid $190 for the plane ticket based on the price comparisons on Kayak. Because of this hasty and naieve commitment, I ended up being forced to pay $200 more (surprise!!) for round trip tickets for my carryon and checked bag. If i had wanted to choose my seats (extra a charge) or have a snack on the flight (extra charge) this flight would have been immensely expensive. And the seats are incredibly hard, uncomfortable and do not recline. Almost $400 for a round trip of discomfort and unpleasant surprise charges...I'm betting this airline will go out of business quickly due to lack of repeat customers."

Pros: "Nothing"
Cons: "I had 2 tickets booked for Boston on November 17th at 5:58pm. I tried to check in online for both travelers, but according to Spirit Airlines website, you cannot check 2 tickets from the same account. When I arrived at BWI airport and went to the Spirit Airlines desk the lady told me that the flight is closed even though it was still not boarding time yet. I explained to her what happened and asked for cooperation, but she just kept repeating that flight is closed and next flight is in 2 days, which I couldn't wait for, because of the scheduled appointments that I had in Boston. In general the service was terrible and the website platform didn't work right. I had tk pay $250 dollars for last minute ticket while I already lost the money for the first two tickets."

Cons: "Flight was delayed 1.5 hours that they did not tell us about until we got to the gate because of 'air traffic', which should have been known ahead of time. Flight attendants were obviously tired and in a bad mood. Very small room in seat. The passenger behind me had her knees digging into my back the entire trip. A woman got too drunk and had to be moved to the front of the plane right in front of me because she was too intoxicated and out of hand. She was yelling and then threw up. It was overall one of the worst flights I've had in a very long time. It wasn't all Spirit's fault, but they didn't help the situations because you're paying for the "bare minimum"."

Pros: "Very cheap flight! Nice attendants. Good pilot. I seriously didn't even feel the touchdown. I never experienced that before!"
Cons: "I was lucky enough to only be traveling with a small backpack - which is good - because if you didn't pre-pay for a carry-on, we were told by the gate agent it would be $65. And if you didn't come up and pay the $65 - it would be $100 when you boarded! What?! All economy seats are small now but at least they recline a little. These didn't - and they're smaller. The most painful flight I've ever had (only 6 feet tall) - the seat is stick straight! if you have a carry-on and especially luggage - just pay the extra for another airline. The price will definitely even out and you'll get a seat you can actually breath in! At one point they were trying to sell so many extras I thought they were going to start a time-share pitch. So unless you just have a back pack or purse - stick with another airline."

Pros: "Nothing"
Cons: "Where do I begin? The price seemed reasonable until I arrived and they charged me $55 to CARRY-ON my bag. Would have been $55 to check it but I was afraid they would lose it. Then boarding the plane there was a sign saying "FIT CREW: We have the youngest crew of any airline". To me that says age discrimination and also inexperience. When I finally sat down, there was trash on my seat and also facial oil on the window. It was clear that they did not clean between flights. Sitting down, my seat was broken and reclined every time I leaned against it. I had a child about 5 years old behind me that was disturbing everyone in our area and the flight attendant never addressed the situation with their parent. When the child was slamming their tray up and down on the back of my seat, a stranger finally said something. Also, don't expect to even get water for free. $3 a pop! The landing was also extremely rough. Needless to say, I will never fly this airline again!"

Pros: "I booked a flight to Colorado for a wedding. I'm poor, so every little bit helps. The cabin crews both times were cheerful and friendly."
Cons: "I bought two checked bags (one for there, one for back). I didn't want to spend the money, but I was in the bridal party (thankfully able to use one of my old dresses), so I had to have the extra space. But at the airport I discovered that the bag I was bringing was instead able to be brought onboard as a free "personal item." The people at the counter assured me that I would get a refund. Well, no refund. I get a "credit" for free checked bags, which I have to use within the next two months or it expires! How can I possibly afford another ticket, do they think their low prices attract jet-setters? This is actually not a good thing for me, I really am poor (like, I had to give up lunch for a month in order to afford a checked bag, poor), and I am very unhappy about this. I will not fly Spirit again. I hope they enjoy my $60."

Pros: "The cost of the trip was very low - with all the frills removed, air travel can be relatively cheap. Plan ahead - you will not be able to use TSA Pre-Check, you will have to pay extra to carry on a bag (so buy your bag online at the airline's website before you go to the airport - this is the cheapest way to do it as they charge you more to purchase the carry-on at the check-in counter and even more if you wait until the boarding gate), and you will have to pay for all beverages including water and provide your own in-flight entertainment. If you plan ahead and know what you're getting into, flying Spirit can be a pleasant experience. The flight staff is friendly and polite."
Cons: "The seats are very close together - don't expect to have any leg room - and they do not recline. Bring a neck pillow if you have any intention of sleeping."

Pros: "Nothing"
Cons: "I fly a lot. I took spirit because of the great deal I got, but will never fly them again no matter what. I will pay more for a flight because of the poor customer service. My flight was cancelled after being delayed after 10 mins. This is was about my 10th time flying the airlines, I was trying to give them a chance, and every time have had serious problems. I work customer service and understand how annoying these message are and realize there will probably be nothing done about how I feel and the poor service I received, but really this was a horrible experience. Lucky I am savy at finding new flights. I stood in line to change mine while on the phone with spirit and lucky cancelled the flight with spirit. I had to rebook with a different airlines. The difference between the flight was $240. My husband rebooked it for me while I was on the phone with spirit. Never again will I fly this airlines, no matter what I do!"

Pros: "It was simple and convenient and got me where I was trying to go cheaply. It was fairly clean n what not and I liked how kind of hip it felt with their process and design. It really does feel like a modern airline sort of like an uber or something but in order to make it cheap they do cut down on pretty much anything that makes the experience kind of luxurious. The chairs were quite thin for example and no in flight food was complimentary. I was able to take my large backpack on the flight free as a personal item so that was great too. They have a metal frame to check the size of your item. If it fits in there it can be a personal item. My backpack was able to squeeze but typical carry on's may not. It also really felt like an airline for the youth which goes along with that kind of young and hip feel. Good stuff."
Cons: "The thin somewhat stiff chairs were difficult to sleep in."

Pros: "I chose Spirit's flights from a listing on Kayak. The flight APPEARED to be less expensive than others listed."
Cons: "I was furious to discover large additional charges after my nonrefundable fare was purchased. Having to pay an additional charge for a basic seat was an insult. Why wouldn't a basic seat be included in the ticket price? The ticket can't be used without one! Having flown on another airline a very few months ago with no charge for a carryon bag, HavING to not only pay for a single carryon, but pay more than the cost of checking the bag was infuriating. Findng additional charges for even a small soft drink during the flight simply added to the offensive sales practices. Having duly paid these fees, the extremely tight spacing of the seats allowed for absolutely no movement during the flight. Immovabe seat backs and cheap hard molded plastic seats did nothing to alleviate the feeling of disregard for customers. During and after the flight, I heard a steady stream of customers saying that they would never fly with this airline again."

Pros: "Flight was on time. Flight was comfortable. Crew was kind."
Cons: "Hidden fees were angering. It is marketed as unbundling, but this isn't advertised until its to late. i was shocked when I checked in online and was required to select a seat and tonpay an additional fee for it. Because other, less expensive seats were taken,I had to pay $50 for a seat on a flight that I already paid for. There was a fee for my bag, regardless if I check or carry on. Everyone has at least one bag! Unless I'm flying to be there for a couple of hours, I need a bag how dare you charge me for a seat and one carry on size bag. These things are standard. Food was very limited and very overpriced for the minuscule items. I had to pay $2.00 for about 10oz of coffee. In the end, Also, none of the seats on the flight recline so forget being comfortable and resting on the flight b In the end I paid more for this flight that I did when I made the same trip in Jet Blue. This "unbundling" is a marketing tactic designed to sooo customers into spending money on additional (some required) fees. I will never fly spirit again."

Pros: "The cabin crew and pilot wert wonderful!"
Cons: "Checking in was a nightmare! The self serve kiosk was at the counter and we had to wait in line with full service to even get to one, that took almost 40 minutes, then tsa had an unbelievably long line and took another hour! We got to the gate just in time for final boarding call. The flight crew announced they were going to close doors but changed their mind to continue "refueling" and let almost fifteen more people on! If I had been one of those people who got to the gate to be told boarding was completed I would have been furious! They needed to wait for those people, still it delayed our flight about 20 minutes. The flight itself was a little bumpy, definitely an economy airline."

Cons: "We had the unfortunate experience of dealing Spirit Airlines yesterday at Hartsfield-Jackson Airport, August 13th, on the way to Boston for a wedding. We were asked to check in at the kiosk, which we did. And after spending $412.36 on airline tickets in July, we had to pay $55 for one carry-on bag. After completing the transaction, we were notified that our boarding passes could not be printed and head to the desk. After speaking with their customer representative, "James", we were told the flight was closed and there was nothing he could do. He said the flights are non-refundable and we should have arrived sooner, although our receipt clearly shows we were there ahead of their 45 minute mark. We asked him for our $55 dollars back for the baggage and he said he'll need to get his supervisor. This is when "Carmen" the supervisor came to the station. Their names are in quotations because both employees refused to turn their badges over to show their names, which seems very shady at a security-centered facility like a main international hub airport. (I took photographs of both employees) She said she can not give us a refund and rudely pointed to our receipt to mention all baggage fees are non-refundable. We asked her why would Spirit even charge us a baggage fee for a flight they were not going to let us get on and she said she didn't know, but she can't help us. Neither employee offered any assistance to get us on another flight. We have contacted Spirit Airlines with the receipts showing the time and photographs of the employees, but I think this issue requires further assistance after reading multiple stories online dealing with this same airline. The fact that they are allowed to charge us for bags the day of, then not refund the money, while taking our flight fees, seems illegal. I urge you to take a look into their business practices. They have cost my family hundreds of dollars, with regards to hotel and rental car cancellations, lost traveling fees, time off work, and the main displeasure of missing a wedding!"

Pros: "Unfortunately there is nothing positive to say here."
Cons: "Sadly we had a horrible experience at the airport with the spirit staff. The customer service representative had over 60 people lined up against the wall, not allowing them to "check in" because of minor delay. They were then hand picking who they would let in line, based on their flight and boarding pass. In addition to this I didn't want to spend my day at the airport so I booked another flight home. THEN to realize HE made a mistake..... That was the flight delayed! I then had to ask for a refund and explain that he mixed up my flight. Had 40 min to make it through security at that point. It's been 3 weeks and still no refund. Never again!"

Cons: "This was the worst flight experience I have ever had. Spirit switched their flight to a smaller airplane at the last minute and left about a dozen passengers without a seat, left stranded on a flight they PAID FOR, checked in online for, and ARRIVED AT THE AIRPORT over 2 hours in advance for. They refused to communicate with us as we waited. They were completely understaffed and left a single employee to handle this. His ineptitude delayed the entire flight and stranded passengers remained stranded. Horrible, incompetent, disorganized, and completely Spirit's fault."

Pros: "Some of the flight attendents were hilarious! It almost (not quite) makes up for their poor service."
Cons: "They cancelled our flight on the way back, which happens a lot I understand. The earlist flight they could give us was more than a week later, and they offered no other solutions. We ended up spending twice as much as we were given back for our cancelled flight in order to get home. Not only were they not helpful in finding this flight (my husband had to run around the airport looking for a flight home) but they also could not confirm the amount that would be refunded when we called back later. They also give you a lot of hidden fees (i.e. $90 for a carryon rountrip)."

Pros: "Nothing good about this airline... It is a horrible airline run by rude inconsiderate people who try and rip you off with hidden fees and services! Their business motto is "Let's trick our customers into paying more and then lie to them when they ask simple questions" That's not a good way to run a company and quite frankly I don't understand how they're still in business.... See my bad review section for more details"
Cons: "The flights were delayed both ways on the round trip, the first flight by 3 hrs and the return flight 1 hour. Both flights were not delayed due to weather because it was nice out. Just poor management. Our return flight was delayed when I woke up that morning and all day it remained delayed on their website. Until 2 hrs before the flight it was switched back to ontime. We called Spirit to confirm and they said it was ontime. So we had to rush out of the house and skip the dinner my father in law made everyone because the airport is an hour away. We got to the airport only to find the flight was delayed on the board. We went to the gate and the Spirit employees kept assuring us the flight was not delayed even after the scheduled time the flight was suppose to leave they continued to lie and were completely dishonest with everyone on the flight. Very rude customer service and they would just ignore people and walk down the runway and shut the door so they wouldn't talk to us or give anyone an update. We could have gone and had dinner had they not lied to us about the departure time. Just the worst airline I've ever dealt with in my life... they may be cheap but you get what you pay for... and any upfront cost for the ticket is false advertising because once you purchase the ticket you then have to pay for a carry on bag, you have to pay to pick a seat on the plane, you have to pay to check in when you're at the airport, and you have to pay for any services on the plane including the "complimentary drink or snack." Their seats on the plane do not recline at all to make things more comfortable either. I will never fly them again and I warn anyone else who might think saving $50 on the ticket price is worth it cause they get it back in the end and then some!"

Pros: "Cheap flight, no waiting to print boarding pass."
Cons: "The flight was slightly delayed, but the gate agent did not seem to know about it and the email was sent well after the scheduled boarding time. It was completely unnecessary for me to run through the airport. The same thing happened the last time I flew from BWI to Logan with Spirit."

Pros: "Absolutely nothing."
Cons: "We were told that our flight was delayed, with no explanation. Then, we were told it was weather. However, weather in Boston was clear and then slightly stormy. They said it was a 'ground stop' which is for severe weather. People waiting for passengers in Boston said that the weather was not severe. Then, after waiting for hours, with a plane at our gate, our flight was canceled, without explanation. People received conflicting information from, a cabin pressure issue, to a severe smell aboard the plane, to a ground stop in Boston. Spirit could not book us on another flight or a different airline until potentially late the next day (we didn't wait in the 2-hour line to find out). This is the last time I will fly with Spirit. Budget tickets shouldn't mean budget service and lies."

Pros: "The flight was very cost effective."
Cons: "There was a presentation made to all passengers midflight trying to get everyone to sign up for a credit card in return for a "free" flight on the airline, presented as a gift. As a captive audience member, I found this very unprofessional, especially since the airline first proclaimed that all passengers could have a free flight then appended their statement with "as long as you sign up for a Spirit credit line." I also don't like the $10 charge for a printed boarding pass at the airport from Spirit; I understand the concept of modularizing costs, but there is no way the act of printing a pass for a passenger costs the airline remotely close to $10. It is a clear attempt to capitalize on a customer's forgetfullness."

Pros: "Crew stayed friendly despite an annoying delay. Information about the delay was first shared quickly (by the pilot I think)."
Cons: "After not even boarding before our departure time and then being told to deboard and wait two hours, there were several concerns. 1) The staff who handled boarding weren't articulate in the process and came off rude. 2) By the time we deboarded, all the kitchens were closed and even snack places were closing. So everyone who was now upset and hungry. 3) When it was time to board again, no announcement was made over the loud speaker, despite several of us getting confirmation that would happen when we first got off. 4) If it was my company, and I would have noticed the terminal was closing the shops and would have offered complimentary beverages to passengers during the flight. Almost everyone I talked to or overheard directly expressed their dissatisfaction with Spirit airlines and vowed they would not be using them again. An unexpected free soda would have been a cheap way for you to sway some people to give it another shot."

Pros: "Plane was clean and the crew was friendly and professional. Spirit refunded part of my ticket when my connecting flight was cancelled."
Cons: "After flying Spirit Airlines for the first time, I came to realize a cheap flight doesn't save you money in the long run. Flight delays, cancellations, and added costs meant I didn't save any money flying with Spirit. I booked a flight from Cleveland to Denver with a lay over in Dallas. My lay over in Dallas was canceled due to weather. I understand that the airline doesn't have any control over the weather but they can control how they treat their customers. The best Spirit could do was offer me a flight to my final destination 21/2 days later. Meaning I would be stuck in Dallas for 2 days and I would have to pay for a hotel out of pocket. I ended up paying for a hotel overnight ($171) and booking a flight first thing in the morning with Frontier airlines ($89). Coming back, once again there was problems in Dallas during my lay over. The flight was delayed 3 hours."

Pros: "Because carry on bags cost more than checked, the line to check in is quite long but boarding is generally quite smooth because you have fewer people fighting for overhead space."
Cons: "Spirit's big claim and advertising push is that they will save you money by only making you pay only for what you need. In theory that's great. But their practices make it clear they're not in the business to save you money but rather to entice you with a cheap base fare and then find lots of individual places where they can price gouge. When my husband booked tickets, they told us that checked bags would be $21. We factored that in to the price and decided this was still there most affordable option. But I guess you had to pay right then, because when I checked in the night before, it cost me $40 per bag. And my husband checked in day of and was charged $50. We also couldn't sit together because they wanted to charge $9 to pick seats. It doesn't cost the airline anything to let us pick seats nor twice as much to carry your bag if you pay for it on flight day, so these extra fees and escalating prices don't say "we're all about saving you money," as they claim. In the end, we paid $195 in bag fees (40+50+40+40+25 for one bag over 40 pounds), couldn't sit together, and didn't even get a glass of water."

Pros: "Nothing"
Cons: "Customer service was absolutely terrible. I thought that the walk-up fee for luggage would be $35/45 but when it was $50 I gave a shocked expression. Which, that's fine if it was advertised that way (I'm sure it was). But when the lazy desk attendant, who was doing nothing but holding a wall up, says "I can't believe people are shocked when you tell them that, it's like come on you know." I'm fine with you saying that when I'm gone, but when people are standing right there and can hear you while you are acting like they aren't even standing there....that is when you have a customer service issue. Although I wanted to lash into him, I felt like it wasn't worth it and much below my level, and I apologize for not gathering that person's name so you may address this properly. Understandable that there are delays, but there shouldn't be a delay EVERY time that a person fly's on a certain airline. I'll try to print tickets online and it says error, but then need to have a discussion about why I am not paying $10."

Pros: "Nothing"
Cons: "The flight was delayed then cancelled. We were given the choice of refund that will arrive a week later or to take a flight a 9 pm tomorrow. The reason for the cancellation was said to me a crew "time-out" that was caused by the rain. There was no other compensation for the cancellation nor did they get ahold of everyone to let them know it was cancelled. After dealing with the gate I found the customer service desk and waited for 2 hours just to talk to someone and was told nothing they could do."

Pros: "nothing"
Cons: "My flight to Boston was 1:54 PM ORD 6/2/16. I booked this flight months ago in order to attend my daughter MIT convocation ceremony on 6/3/16. I arrived at ORD very early in the morning on 6/2/16 and waited at the gate L7 before 11 AM. The flight was kept delay several times, I waited near by the gate and checked with the desk lady many times and was kept told that the flight was delayed, finally the flight left around 3:55 PM without any announcement. I missed the flight. I was told to go to gate 11A for this issue. Martin who worked there with the customers like me who missed the flight was very impatient and not helpful at all. Never take the Sprint airline again."

Read more about Spirit Airlines
COVID-19 information

Safety measures for airlines flying from Denver to Boston

Airlines flying from Denver to Boston have enacted additional safety measures and adjusted policies to better accommodate travelers. Policies vary by airline.

Heightened sanitation

Daily cleaning, installation of cabin HEPA filters on flights from Denver to Boston

Mandatory masks

Masks required on board, masks provided on flights from Denver to Boston

Social distancing seating

Middle seats unavailable to book on flights from Denver to Boston

Pre-flight testing

Testing for antibodies, testing for symptoms for flights from Denver to Boston

Book cheap flights from Denver to Boston

Recent round-trip flight deals

11/4
Thu
1 stop
Spirit Airlines
8h 29m
DEN - BOS
11/8
Mon
1 stop
Spirit Airlines
11h 20m
BOS - DEN
9/29
Wed
1 stop
Spirit Airlines
9h 15m
DEN - BOS
9/30
Thu
1 stop
Spirit Airlines
8h 46m
BOS - DEN
9/28
Tue
1 stop
Spirit Airlines
9h 12m
DEN - BOS
10/6
Wed
1 stop
Spirit Airlines
11h 20m
BOS - DEN
10/5
Tue
1 stop
Spirit Airlines
9h 15m
DEN - BOS
10/12
Tue
1 stop
Spirit Airlines
11h 20m
BOS - DEN
11/4
Thu
1 stop
Spirit Airlines
8h 29m
DEN - BOS
11/7
Sun
1 stop
Spirit Airlines
11h 20m
BOS - DEN
9/30
Thu
1 stop
Spirit Airlines
9h 12m
DEN - BOS
10/2
Sat
1 stop
Spirit Airlines
19h 33m
BOS - DEN
11/9
Tue
1 stop
Spirit Airlines
8h 29m
DEN - BOS
11/18
Thu
1 stop
Spirit Airlines
10h 50m
BOS - DEN
11/5
Fri
1 stop
Spirit Airlines
8h 29m
DEN - BOS
11/9
Tue
1 stop
Spirit Airlines
11h 20m
BOS - DEN
11/5
Fri
1 stop
Spirit Airlines
8h 29m
DEN - BOS
11/7
Sun
1 stop
Spirit Airlines
11h 20m
BOS - DEN
10/6
Wed
1 stop
Spirit Airlines
8h 29m
DEN - BOS
10/13
Wed
1 stop
Spirit Airlines
11h 20m
BOS - DEN
10/2
Sat
1 stop
Spirit Airlines
9h 15m
DEN - BOS
10/4
Mon
1 stop
Spirit Airlines
8h 46m
BOS - DEN
10/8
Fri
1 stop
Spirit Airlines
8h 29m
DEN - BOS
10/12
Tue
1 stop
Spirit Airlines
22h 27m
BOS - DEN
10/11
Mon
1 stop
Spirit Airlines
8h 29m
DEN - BOS
10/14
Thu
1 stop
Spirit Airlines
11h 20m
BOS - DEN
10/3
Sun
1 stop
Spirit Airlines
9h 12m
DEN - BOS
10/7
Thu
1 stop
Spirit Airlines
11h 20m
BOS - DEN
9/27
Mon
1 stop
Spirit Airlines
9h 12m
DEN - BOS
9/30
Thu
1 stop
Spirit Airlines
8h 46m
BOS - DEN
10/18
Mon
1 stop
Spirit Airlines
8h 29m
DEN - BOS
10/25
Mon
1 stop
Spirit Airlines
11h 20m
BOS - DEN
10/16
Sat
1 stop
Spirit Airlines
15h 39m
DEN - BOS
10/19
Tue
1 stop
Spirit Airlines
30h 06m
BOS - DEN
9/29
Wed
1 stop
Spirit Airlines
9h 15m
DEN - BOS
10/1
Fri
1 stop
Spirit Airlines
8h 46m
BOS - DEN
11/12
Fri
1 stop
Spirit Airlines
8h 29m
DEN - BOS
11/16
Tue
1 stop
Spirit Airlines
21h 17m
BOS - DEN
9/30
Thu
1 stop
Spirit Airlines
9h 12m
DEN - BOS
10/3
Sun
1 stop
Spirit Airlines
8h 46m
BOS - DEN
Show more results

Search by stops

Search by airline

Recent one-way flight & train deals

12/10
Fri
1 stop
Spirit Airlines
10h 05m
DEN - BOS
10/8
Fri
1 stop
Spirit Airlines
8h 29m
DEN - BOS
11/4
Thu
1 stop
Spirit Airlines
8h 29m
DEN - BOS
10/2
Sat
1 stop
Spirit Airlines
9h 15m
DEN - BOS
10/11
Mon
1 stop
Spirit Airlines
8h 29m
DEN - BOS
10/23
Sat
1 stop
Spirit Airlines
8h 29m
DEN - BOS
10/17
Sun
1 stop
Spirit Airlines
8h 29m
DEN - BOS
10/3
Sun
1 stop
Spirit Airlines
9h 15m
DEN - BOS
10/11
Mon
1 stop
Spirit Airlines
8h 29m
DEN - BOS
10/18
Mon
1 stop
Spirit Airlines
8h 29m
DEN - BOS
9/29
Wed
1 stop
Spirit Airlines
9h 15m
DEN - BOS
9/28
Tue
1 stop
Spirit Airlines
9h 12m
DEN - BOS
12/5
Sun
1 stop
Spirit Airlines
10h 05m
DEN - BOS
10/7
Thu
1 stop
Spirit Airlines
8h 29m
DEN - BOS
10/13
Wed
1 stop
Spirit Airlines
15h 39m
DEN - BOS
10/15
Fri
2 stops
Multiple Airlines
15h 47m
DEN - BOS
10/4
Mon
2 stops
Multiple Airlines
15h 25m
DEN - BOS
11/1
Mon
2 stops
Amtrak
46h 42m
EN8 - ZTY
11/1
Mon
2 stops
Amtrak
46h 42m
EN8 - ZTY
11/1
Mon
2 stops
Amtrak
46h 42m
EN8 - ZTY
Show more results

Search by stops

Search by airline

Search by train company

-
1
  • Round-trip
  • One-way
  • Multi-city
  • Trip Builder
  • Economy
  • Premium Economy
  • Business
  • First
  • Multiple
Economy
  • Economy
  • Premium Economy
  • Business
  • First
Economy
  • Economy
  • Premium Economy
  • Business
  • First
Economy
  • Economy
  • Premium Economy
  • Business
  • First
Economy
  • Economy
  • Premium Economy
  • Business
  • First
Economy
  • Economy
  • Premium Economy
  • Business
  • First
Economy
  • Economy
  • Premium Economy
  • Business
  • First