$96 Find Cheap Flights from Boston to Boulder

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Boston to Boulder departing on 2/22. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$198
Overall average: $347
Multiple Airlines
Thu 2/19Mon 2/23
BOS - DEN • 1 stop
Cheapest non-stop
$199
Typical prices: $232-$436
JetBlue
Sat 2/28Thu 3/5
BOS - DEN • Non-stop
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Flight Deals
Useful Info
Flight Deals

Cheap Flights from Boston to Boulder (BOS-DEN)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Boston to Boulder that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Boston to Boulder

Thu, Feb 19 - Mon, Feb 23
Multiple Airlines Logo
5:50 pm - 9:11 am
BOS
-
DEN
17h 21m
1 stop
Multiple Airlines Logo
9:06 pm - 1:13 am
DEN
-
BOS
26h 07m
2 stops
$198Multiple Airlines
Sat, Feb 28 - Wed, Mar 4
JetBlue Logo
7:31 pm - 10:18 pm
BOS
-
DEN
4h 47mnonstop
JetBlue Logo
11:15 pm - 5:02 am
DEN
-
BOS
3h 47mnonstop
$199JetBlue
Sat, Mar 14 - Tue, Mar 17
JetBlue Logo
6:57 pm - 9:45 pm
BOS
-
DEN
4h 48mnonstop
JetBlue Logo
10:39 pm - 4:27 am
DEN
-
BOS
3h 48mnonstop
$200JetBlue
Wed, Feb 11 - Sun, Feb 15
Southwest Logo
6:25 am - 1:50 pm
BOS
-
DEN
9h 25m
1 stop
Southwest Logo
10:40 am - 4:30 pm
DEN
-
BOS
3h 50mnonstop
$201Southwest
Sat, Apr 25 - Sat, May 2
Multiple Airlines Logo
6:00 am - 12:09 pm
BOS
-
DEN
8h 09m
1 stop
Multiple Airlines Logo
11:08 pm - 5:01 am
DEN
-
BOS
3h 53mnonstop
$202Multiple Airlines
Sat, Apr 25 - Sat, May 2
JetBlue Logo
7:31 pm - 10:13 pm
BOS
-
DEN
4h 42mnonstop
JetBlue Logo
11:08 pm - 5:01 am
DEN
-
BOS
3h 53mnonstop
$203JetBlue
Mon, Feb 23 - Fri, Feb 27
JetBlue Logo
7:31 pm - 10:18 pm
BOS
-
DEN
4h 47mnonstop
JetBlue Logo
11:15 pm - 5:02 am
DEN
-
BOS
3h 47mnonstop
$204JetBlue
Thu, Feb 19 - Thu, Feb 26
Multiple Airlines Logo
10:01 am - 7:11 pm
BOS
-
DEN
11h 10m
1 stop
Multiple Airlines Logo
11:15 pm - 5:02 am
DEN
-
BOS
3h 47mnonstop
$205Multiple Airlines
Mon, Feb 23 - Fri, Feb 27
JetBlue Logo
7:31 pm - 10:18 pm
BOS
-
DEN
4h 47mnonstop
JetBlue Logo
11:15 pm - 5:02 am
DEN
-
BOS
3h 47mnonstop
$206JetBlue
Mon, Mar 16 - Thu, Mar 19
Southwest Logo
6:45 pm - 11:20 pm
BOS
-
DEN
6h 35m
1 stop
Southwest Logo
7:05 pm - 12:50 am
DEN
-
BOS
3h 45mnonstop
$207Southwest
Useful Info

Good to know

Low seasonNovember
Cheapest flight$96
Best time to beat the crowds with an average 4% drop in price.
Most popular time to fly with an average 8% increase in price.
Flight from Boston to Denver

When to book flights from Boston to Boulder

Are your dates flexible? Find out the best times to travel from Boston to Boulder based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

FAQs for booking flights from Boston to Boulder

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

    When flying out of Boston you’ll be using Boston Logan Intl. Boulder does not have its own airport so you’ll be flying into nearby Denver Intl airport, which is 33.4 mi away.

  • How long does a flight from Boston to Boulder take?

    Direct flights cover the 1,748 miles separating Boston and Boulder in about 4h 45m.

  • How many flights are there between Boston and Boulder?

    19 direct flights run between Boston and Boulder on a daily basis. On average, there are about 134 departures each week.

  • What’s the cheapest day of the week to fly between Boston and Boulder?

    Consider leaving on a Wednesday and avoid Sundays if you are looking for the best rates. For your return to Boston, you’ll find the best rates on Saturdays and the most expensive ones on Sundays.

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

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Boston to Boulder.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Boulder from Boston is likely to change within 7 days, so travelers know whether to wait or book now.

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

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Boulder with an airline and back to Boston with another airline.

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

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Boulder from Boston up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • Which airlines provide the cheapest flights from Boston to Boulder?

    In the last 72 hours, the cheapest one-way ticket between Boston and Boulder found on KAYAK was with Frontier for $59. Frontier offered a round-trip connection from $92 and Delta from $108.

Top tips for finding cheap flights from Boston to Boulder

  • There is no airport in Boulder. Instead, you’ll be flying into Denver Airport when flying between Boston and Boulder.
  • The cheapest flight from Boston to Boulder was found 76 days before departure, on average.
  • Book at least 2 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 March.

Reviews of the top 5 airlines serving Boston to Boulder

 
Need help choosing which airline to fly with from Boston to Boulder? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4267 reviews
8.1Boarding
8.6Crew
7.5Entertainment
8.0Comfort
7.0Food
Airline reviews

WIFI was great. My selection for seating is an aisle, but during my trip, I never had an aisle seat. If we can get that corrected, I will be thrilled. No snack or drink on this flight.

10.0 ExcellentJoseph, Jan 2026
BWI - RIC
Read more Southwest reviews

WIFI was great. My selection for seating is an aisle, but during my trip, I never had an aisle seat. If we can get that corrected, I will be thrilled. No snack or drink on this flight.

WIFI was great. My selection for seating is an aisle, but during my trip, I never had an aisle seat. If we can get that corrected, I will be thrilled.

The wifi on the plane is great. The only issue that I have is that I prefer an aisle seat and on my trips this week, I was either in the middle or window. If we can work to secure aisle seating, I will be thrilled. Nice trip.

All good except once again bags took an hour at Midway Airport Happens all the time. Ridiculous

Everything went smoothly and we even arrived a little bit early.

Great vacation. Can't wait till next year for another one.

Great flight but super high price. Glad it was a business trip and not personal

On time. Friendly staff. Took to long to pre bord all the specialty groups. Cramped small plane

The seats were comfortable, and the boarding process was pretty smooth.

3 hour delay. Had to change plans and was still delayed.

I didn't take this flight. I changed the flight. Why am I getting surveys and notifications on flights that I change. Seems like a defect with Kayak.

Delta One is extraordinary. I fly business when somebody hires me. I just wonder why there is such a chasm between business class and the insanely inhumane and nonsensical coach. The seats are not large enough to fit even my tiny wife. We fly 10% of what we did because we don’t want to pay 5-10 k but for $400 it’s unbearable. It seems like the accountants took over and made stupid decisions. Screw in 20 extra seats and make it so unbearable that people fly 90% less. Just put the damn price up and put some proper chairs in. But business, yay.

Timing, quality of service, promptness and courtesy of the staff

It was last minute due to weather - considering - it was amazing! Good smiles, friendly staff and they were making sure we knew what was going on when and where.

delta last minute gave me a boarding pass for a different flight with no confirmation that they were changing it

The service from the flight attendants were of supreme quality. They greeted and treated everyone with a wide smile. This is totally absent nowadays. Kudos to them!!!!

Excellent flight and got us around tough weather. Only issue was seat TV did not work and crew tried to reboot.

Very large passenger too space from my own seat. Arm board couldn’t be lowered because of his size. It wads very uncomfortable trip, as the flight was full couldn’t move anywhere having back pain because of the position in which I was the entire flight.

was sitting in the jet bridge for 10 minutes in -20 degree weather waiting for my bag

Outdated equipment in disrepair, wifi inoperable. Broken seats, taped air vents, generally poor condition, the 717 showed its age and lack of upkeep.

Seated dude next to me even though lots of empty rows. But main thing was we sat on the tarmac after landing for 30 minutes because of, in the words of the dude who sat next to me, “operational incompetence”. We got changing directions about where to pick up gate checked bags. Pilot and flight attendant were awesome though.

The flight was delayed by two de-icings. The seatbelt did not work correctly. It did not stay tight.

Hotter than Hades in August. Why, why do crews think that in the winter when we are already dressed for cold weather we need a cabin that is 82 degrees. Even the vents were blowing hot air.

Flight was delayed. De-icing took a while. When we landed had to wait for another plane to vacate our gate. Just an overall bad experience.

Not good - outbound flight was delayed and missed my connection even though I got to the gate after running through the airport - the agent would not let me on because the door was closed (flight had not left). There was no notification from United - overall experience was very disappointing. Additionally, I was downgraded from first class to coach on the alternative flight

United have really come back. Airport and boarding process is clear and good, app and information also very good

They brought an empty plane to the gate. Then a flight delay was announced for maintenance and waiting on a part. I was then put on a flight to San Francisco instead with a connecting flight to my final destination. Arrived at my final destination 2 hours late.

The entertainment available didn’t work for anyone on the flight. Long 6 hr flight with no entertainment option and the staff didn’t know until an hour into the flight when we made sure they knew about it. They had no way to fix it.

Late FA meant slow boarding. WiFi did not work. I’m a medium plus sized passenger. The seatbelt was for the first time ever barely fitting. And we delayed on the tarmac 40 min

My husband and I had boarded the flight from Denver to Chicago, and one of the last passengers to get on the plane opened the overhead bin above my husband's seat and threw his bag out of the bin to make space for his own. He said, "Mine is bigger!" The flight attendant supported the new passenger. They didn't care that my husband has two artificial knees and must have the foot room in front of his seat to be able to fit his legs in -- and to be able to stand, much less walk, at the end of the flight. I have never seen this happen before, and it was a disaster.

Terrible. They canceled our early morning flight after midnight on the day of and had no available flights to rebook my family on for the next 72 hours. Yet they still had other flights that were not cancelled from JFK so it couldn’t be based on the weather. It felt like they canceled the flight based on it not being profitable enough for them. I am not interested in traveling with the again. The absolute worse customer service and lack of accountability.

Horribly rude check in at airport, worst in 25 years of flying. All over a simple issue they could have googled to resolve.

First time flying with JetBlue and never again. I went to the counter to request meet and assist because I'm 74 and my wife is 79. I walk with a cane and my wife is handicapped and has her own wheel chair. I told the agent that my wife and luggage was at the entrance door. The ticketing agent said to me that they don't offer meet and assist. I need to bring them our luggage and then go back and get my wife in order to get my boarding pass. As I went back to get my luggage a Southwest agent along with a TSA agent recognized the situation and came over and took my wife and luggage to the JetBlue ticketing counter alongside the line and told the JetBlue agent to issue to take our luggage as soon as they could.

1) No pilot available for 1 hour 2) no room for most passengers careyon in overhead—-> stowed below 3) when we landed we had to wait 45 min. Before docking at gate as gate was not ready

It was good. I prefer JB over other airlines.I just wish we had headphones for the films, but other than that - good.

The ride share experience in JFK is terrible. After traveling on a flight, then you need to take a subway to the last stop to get an uber or lyft. Unacceptable. Bad job JetBlue for permitting JFK and Port Authority to do this to your passengers.

Checking In on JetBlue site was impossible. It hung up on REAL ID. Even my Global Entry did not help. Luckily, on Kayak site it was a breeze. Entire flight the temperature was COLD! Otherwise the crew was great!

The flight was two hours late due to a computer fault and resulting maintenance. Nothing was offered as compensation beyond bottles of water during the time we were deplaned and waiting in the terminal.

Very pleasant flight attendants. Gate crew rather loud chatting with each other.

Four plus hour flight delay in New York caused us to take off after 11:30pm. We didn’t arrive at our hotel until five hours after check in. Started the trip off feeling exhausted.

It was costly and difficult to check in. $85 to take a small suitcase with me, carry on or checked and $75 on the return trip, Plus $25 if I didn't check my self in check in $25, because I couldn't do it on the kiosk. Small very uncomfortable seats, waited on the runway for near an hour each way. It was my worst flight to date.

Due to weather, my flight was delayed, further delayed, then canceled. I eventually got through to a support person who helped me find a different route out of MSP, but to get to DIA, they didn't want to, but eventually did help with the connection ticket purchase. But even this replacement flight was delayed time and time again, and I would have missed my connecting flights and I didn't want to get stuck in a layover city, so after 12 hours at the airport with two young boys who were very tired, we just cancelled our plans and spent the week at home, instead of Nana's.

I loved the staff on the plane. So friendly and helpful! However, there was an argument and misunderstanding by the staff and a customer at the gate, and the staff member was being unprofessional. When we arrived in Atlanta, we waited 1.5 hrs for our luggage to arrive. When I asked the airport attendant, they said Frontier had the longest wait for luggage out of any airlines, and that they could not be held responsible for the delay.

I knew going into this that Frontier, being a low cost carrier, would be pretty bare bones and charge for most extras but this was made up for by the fact that the airplane was a reasonably new Airbus, every employee was great and best of all, Everett Washington is an amazing airport - thanks Frontier for flying there!!!

Seats were new and comfortable. Staff was fine. Missed my connection due to weather -which wasn’t their fault- but got no help at all. Gate staff sent me to customer service, which was and stayed unstaffed. Sign with QR code directed me to call or chat. Chat was useless. Call was returned after an hour. No itinerary offered by Frontier could get me home in less than 30 hours. Rebooked with another airline and got a partial refund that came to about 10 percent of what I paid to get home.

The experience was good. No frills but I got there safe and sound and on time.

As every law enforcement agency I could imagine surrounded the plane and we didn’t disembark for 2 hours and then had to stick around for another hour to go get our personal belongings after leaving them behind and being bused away from the plane, it was scary and inconvenient. We were given no information as to why this was happening. Lack of communication with passengers was disappointing.

Frontier Airlines was AWFUL. I was an hour early for my flight and the lady refused to check me in. I had to purchase a whole new ticket with a different airline.

Late, terrible communication, horrible planning of passenger seating until the literal last minute. One of the worst flying experiences of my life. Y'all suck

First of all, we never got on the connecting flight to Denver. They delayed our flight for two hours. If we would have gotten on that flight, we would have been stuck in Denver for 13 hours. So we re- routed our flight for a straight through flight to Oklahoma two days later. THEN, they delayed that flight for two hours. After that we were able to finally get on our flight and come home. Frontier Airlines - one of the worst airlines I have ever been on.

Everything you need to know for your flight from Boston to Boulder

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