Find cheap flights from Seattle to Denver

SEA - DEN

Find cheap flights from Seattle to Denver

Search hundreds of travel sites at once for deals on flights to Denver from Seattle

Round-trip
Economy
Seattle (SEA)
Denver Intl
Thu 6/17
Thu 6/24
Any month
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Good to know

Low season

JanuaryBest time to beat the crowds with an average 22% drop in price.

High season

DecemberMost popular time to fly with an average 27% increase in price.

Average price round-trip

$156(avg. price over the last 2 weeks)

Good deal round-trip

$133or less

Good deal one-way

$78or less

When to book flights from Seattle to Denver

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

Top tips for finding a cheap flight to Denver from Seattle

  • Looking for a cheap flight? 25% of our users found flights to Denver from Seattle for $78 or less one-way and $133 or less round-trip.
  • The cheapest flight from Seattle to Denver was found 17 days before departure, on average.
  • Book at least 1 week 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 January.
  • Morning departure is around 10% more expensive than an evening flight, on average*.
  • For travelers looking for non-stop flights from Seattle to Denver, book your reservation with either United, Delta, or Frontier Airlines, as each of these companies offers many flights without layovers. If you would like some extra perks, look into flying with Southwest Airlines, as they provide free checked baggage and snacks.
  • If you’re trying to find a way to pass the time before boarding your flight from Seattle to Denver, purchase an entry ticket for the Club at SEA in Seattle-Tacoma International Airport (SEA). This lounge is open to customers of all airlines and provides guests with snacks, magazines, televisions, and games.
  • Have a question about the airport or need help finding a specific service? Look for the Airport Volunteers stationed throughout Seattle-Tacoma International Airport in bright blue jackets. These volunteers can help you find your gate, recommend dining options, and tell you about the airport’s various amenities.
  • If you are feeling sore after being cooped up in a plane for several hours, consider getting a quick massage at A Massage in Denver International Airport (DEN). With two locations near the A and B Gates, this massage parlor is a quick and convenient way to let go of any tension and stress.
  • For those that are traveling with a small child, take note of the fact that there are private nursing rooms located in each terminal of Denver International Airport. These rooms contain seating, outlets, changing tables, and sinks, and they are free to access.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for booking flights from Seattle to Denver

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Top 5 airlines serving Seattle/Tacoma Intl to Denver Intl

Scores according to KAYAK customer reviews

8.3
Alaska Airlines
Overall score based on 29,416 reviews
8.5
Boarding
8.3
Comfort
8.8
Crew
7.9
Entertainment
7.9
Food
Airline reviews

Pros: "Friendly crew. Great movie selection through gogo inflight entertainment!"

Pros: "Aircraft was clean and comfortable. Crew was efficient and friendly. The whole experience was excellent!"
Cons: "There was lots of entertainment available but plain old music was not an option. What if I don't want to watch a movie or TV, just listen to music!"

Cons: "Seat cushions are too thin."

Cons: "Two rows up from us, I kid threw up all over the center aisle as we were pulling away from the gate. We returned to the gate to allow a cleaning crew to board and clean. However, the cleaning job was rushed and left remnants of the throw up behind which smelled the whole 2.5 hour flight. It really felt unsanitary and unsafe being that it’s unknown what caused the child to get sick. It very well could have been a stomach virus and could have infected the people in rows around the incident due to the mediocre cleaning job. I understand that it’s important to keep flights on-time, especially for connecting flights, but the safety of the passengers and their health should ALWAYS be the #1 priority."

Pros: "Comfortable seats with nice details; power ports; drinks and snacks."
Cons: "Boarding in Seattle was ridiculous. Security took a massive amount of time, and we barely arrived in time for th flight despite arriving hours early. The attendants at the gate were a bit rude and begrudgingly accommodating."

Cons: "Employees who just don't care"

Cons: "I missed the flight"

Pros: "Management as well as staff nice...First trip with Alaska and made my trip nice .. Got a good deal price too."
Cons: "Nothing."

Pros: "Plane very warm, not comfortable. Only one pass for beverage service."
Cons: "Very warm air vents did not work."

Pros: "- Crew was friendly as usual"
Cons: "- The plane was a bit older, so the seats were not as comfortable as most Alaska flights"

Cons: "boarding was late due to repairs on the plane"

Cons: "i wish Alaska would fly straight to Denver from Montana. I fly from Montana to Denver a lot and it ends up being a whole day of travel instead of a couple hour flight."

Pros: "It was a short flight. The overhead bins weren't overloaded."
Cons: "Boarding was a hassle. The flight was too crowded. The food was non-existent.. Seats were uncomfortable."

Pros: "It was on time and friendly"

Pros: "I didn't have to set next to a 500 pound cow."
Cons: "Your beer and wine is sooooooo expensive."

Cons: "Food and wine way over priced."

Pros: "Brand new airplane with comfortable Recaro seats. Great food and wine. Excellent service."
Cons: "Nothing. Alaska Airlines provides the best service available."

Cons: "45 minute delay due to fog"

Pros: "I'm a big fan of Alaska Airlines and their partner Horizon Airlines. I travelled from Edmonton to Denver via Seattle last night. All the staff if pleasant and treats you as a valued customer."

Pros: "Friendly staf. comfortable seats. And no charging for checknig my bags."

Pros: "Boarding was a breeze, crew communicated well, seats were comfortable, plane wasn't too hot or too cold"
Cons: "Had a problem with checking my baggage in anchorage which led to $300 being held from my account for 5 days. They refunded my baggage fee though"

Pros: "Seat was comfortable and in-flight service was very good."
Cons: "Gogoinflight didn't work for at least the first 30 minutes of flight. I upgraded to first class, but there was no service until we were above 10,000 feet. I don't know if this was a one-time thing, or if other airlines are just better at accommodating first class."

Pros: "Friendly staff. Made up time after a mandatory tire change."
Cons: "Other passengers not listening to the staff."

Cons: "No legroom unless you pay more for it."

Pros: "How friendly and professional"

Pros: "On time and effortless."

Pros: "Able to text ..."
Cons: "No Free beer or alternative gluten free snack"

Pros: "Everything"

Pros: "The plane had the usual wifi, drinks and eats. But USB ports and plugs in economy! That's value!"

Pros: "Flight crew was courteous."

Pros: "It was easy to board and a quick flight overall amazing"
Cons: "Just the people next to me taking more room then need but you hace no power over that."

Cons: "Gate 11c."

Cons: "Nada"

Cons: "not able to know my seat till a day before flight ."

Cons: "Service was amazing"

Pros: "entertainment"
Cons: "very rough landing, delayed flight with little communication"

Pros: "Great service and very organized."

Pros: "price"
Cons: "delayed"

Pros: "Early flight, and short. I think I slept through it. Woke up sore, but eh I'm not surprised by that. I'm a giant and no one woke me up for anything so I was satisfied."

Pros: "The crew and captain were amazing and very apologetic!"
Cons: "I paid an extra $300 for preferred seating because I wanted the extra legroom to sleep. I'm over 6 feet so coach is very uncomfortable. My girlfriend and I got in our seats and 10 minutes later, a crew member walked back and asked us to get off the flight. We got off the flight and were met by police officer. Low and behold, the woman sitting next to us said that she believed we were intoxicated and feared for her safety. I am a police officer and my girlfriend is a nanny/preschool teacher. Not very threatening. The officer on the ground looked us over and asked us a few questions and determined we were not intoxicated and we were no threat to the other passengers. The airline asked us to get back on the flight and we would be sitting in coach because the woman adult children were now sitting in our seats. I told them to book us on another flight with the same seats that I PAID for or put us back in OUR seats on that same flight we just got kicked off of. We were escorted back onto the flight and the crew asked the woman's children to go back to their seats so we could have our seats back. They then asked us not to speak to the woman sitting next to us (which we never did to begin with!!!) and then told us we could have free food and drinks. The whole experience was insanely embarrassed and I can't believe that woman sitting next to us can get away with what she did. I am absolutely livid that they would ask us to get off the flight and then give our seats to the woman's ADULT children without vetting the situation and making the easy determination that we were NOT intoxicated. So embarrassing!!"

Pros: "I was made to feel comfortable right from Bangalore by the checkin people, because I indicated to them that I had a fear of missing my connecting flight from Seattle to Denver. My connection to Denver went smoothly,however the flight attendants on Air Alaska need to be more courteous and friendly."
Cons: "Did not like the flight attendants but the pilot made up for the humour that was lacking. Never seen a pilot interacting the way this one did."

Pros: "Glad I discovered Alaska Airlines!"

Pros: "It got cancelled due to 3 inch of snow. And I missed work in Denver because of it. Very inconvenient"
Cons: "I would like to not have it cancel"

Pros: "Offering price"
Cons: "Real price. Ridiculous after carry-on and other fees"

Pros: "Attendants were very friendly and flight arrived early."
Cons: "We were stuck on the runway for 30 minutes."

Pros: "Newer aircraft"
Cons: "1-1/2 hours delay, no reason was given."

Pros: "Ditto statements above"
Cons: "Ditto statements above"

Cons: "I have been on two Alaska Airlines flights on this trip. Neither had any form of entertainment. One flight was 6 hours long and offered to rent out ipads for $17."

Pros: "Promptness of flight"
Cons: "Cramped seating"

Pros: "Delta is doing a great job keeping everything calm and clean during this pandemic!"

Pros: "Amazing"
Cons: "Nothing"

Cons: "It was fabulous as always! Thank you. I love Delta!"

Cons: "Too hot. Bathrooms were dirty. No leg space in comfort+."

Cons: "My flight was delayed almost 3 hours. Not good. Once in the air it was fine."

Pros: "The cabin was to warm"
Cons: "The cabin was to warm"

Pros: "The crew was great and the free entertainment was great"
Cons: "Bring back pillows and blankets especially on red eyes out of Anchorage"

Cons: "Roomier"

Pros: "Just a great experience Delta is still above the rest excluding Hawaiian"
Cons: "Cant think of anything"

Pros: "Everything! Thank you"
Cons: "Nothing. Thanks"

Cons: "Food really bad on both segments."

Pros: "Love the fact that the head rests move to support your head better."

Pros: "Good access to charging, good food"
Cons: "More space:)"

Cons: "No room to move, too hot, no sound when trying to watch movies."

Cons: "No meal option and my video screen volume did not work"

Pros: "Nothing"
Cons: "Nothing"

Pros: "Boarding was easy."
Cons: "I am 6' 1" tall and weigh 220, so not out of the ordinary and I felt like I was stuffed into a sardine can."

Pros: "The website delivered everything I needed."
Cons: "More discounts for frequent users."

Cons: "N-S"

Pros: "Boarding was quick"
Cons: "No entertainment, plane was small"

Cons: "First delay notification: 1 hour 20 minutes 1 hour later, Second delay notification: 3 hours 15 minutes 2 hours later: Third delay notification: 3 hour 50 minutes Fourth delay notification: 4 hours 25 minutes Fifth delay notification: 4 hour 32 minutes No explanation for reason. Last time flying Delta."

Pros: "WiFi on board."

Pros: "We boarded close to on time, no hassles. Allowed my husband and me (retired military) to board early, thank you."
Cons: "LAX security is awful. We never left the airport (arrived LAX from Sydney AU) yet were forced thru security again. Had to remove shoes, was scanned and "frisked" by TSA to get to Denver. To go to Australia, Denver TSA waived the removal of shoes, skipped the scan for the metal detector and no one touched me, ditto for LAX on the trip to Sydney. Where's the uniformity or standards for TSA?? Why did I have to be subjected to this garbage on the way home?? This is why I despise flying. It makes no sense to me. This ruined what was a great vacation."

Pros: "."

Cons: "Old cramped untidy and limited drink service"

Pros: "Nothing"
Cons: "Multilpe delays"

Pros: "This was our first time flying Delta and it was a very pleasurable experience. Boarding was very straight forward and the seats allocated comfortable. A surprise for us was being asked if we would like to move seats from the back of the aircraft to Comfort Economy (we think it was to do with weight balance! but appreciated very much none the less). The flight attendants were very professional and helpful, as you would hope all attendants on all airlines would be. We'd gladly fly Delta again anytime."

Pros: "In a pinch they were able t"

Pros: "Great"
Cons: "Too many announcements"

Pros: "Alaska Airlines is way overpriced and way less comfortable than Delta. I’m a Delta loyalist forever now!"
Cons: "Nothing."

Cons: "We waited 3 hours for the tarmac in Seattle On Christmas"

Cons: "Too crowded."

Pros: "free texting and entertainment!"
Cons: "our flight was delayed half an hour."

Cons: "No drink or snack service. No trash pick up. No option to purchase or rent headphones"

Pros: "Fast and efficient boarding again! Most impressed!"

Pros: "everything was very nice"

Cons: "Excellent service excellent pilot"

Pros: "Enjoyed food and movies.Woul"
Cons: "Would like more comedy or romance movies. Becky"

Cons: "Late and missed my international connection"

Pros: "I love the new snack choices! Way to go Delta for offering Kind bars now!! This is awesome."
Cons: "Tiny old plane, props blocked my window view, no entertainment system."

Pros: "Very friendly and helpful staff."

Pros: "The staff of the flight were very friendly and attentive. They were great!"

Pros: "Very attentative."

Cons: "Aircraft was smelling bad! Hygiene is the key"

Pros: "Helpful staff. Never felt rushed if I had a question. The special meal (VLML) was excellent. Tasty, filling and nutritious Plenty of foot room in economy."

Cons: "I've only experienced delayed flights with Delta ... and this was no exception. It wasn't weather-related, nor a late flight delivering a plane - just no ground crew to service the plane between flights."

Pros: "nice snack"

Pros: "Nothing. Delta sucks!"
Cons: "Poor management prior boarding"

Cons: "Enforce your baggage size and number limits. A significant number of passengers take bags onboard that are oversized."

Pros: "The only airline that I'm aware of that still offers: • free snacks • free checked bags • free meal and drinks on international flights"

Pros: "Everyone was nice and helped with any questions I had"
Cons: "Logging into the internet from the iPad"

Pros: "Yes"

Pros: "The crew was nice. When I finally arrived in Denver, Marlin in customer service was the only saving grace for United for me. When I asked for options for an earlier flight into Rapid City so I didn’t have to wait 24 hours and miss my visit with my sister, he looked at different hubs (Chicago, Minneapolis) to see if they had any available flights into Rapid, he checked for double bookings, and when he couldn’t find anything, he put me on the standby list for the first flight out in the morning and wrote down the flight information for all of the United flights from Denver for the following day. Marlin provided excellent customer service and was a huge credit to the company."
Cons: "The flight was supposed to leave at 3:56 pm and didn’t leave until 7:30 pm. I would estimate at least 15-20 people missed connecting flights because of the delay. According to the United app, the delay initially started in Portland due to mechanical issues, which took over 3 hours. Then, there was a weather delay in San Francisco according to the gate agent - there was a ground hold and no planes were landing or flying out. At some point, I would think another plane would have been an option rather than delaying a flight for this long and disrupting holiday travel for so many people."

Pros: "The crew were friendly and attentive"
Cons: "Delays were caused because the captains lost the fuel sheet and calculated the remaining furl incorrectly. we were delayed 45 minutes for this."

Pros: "Very helpful assistance staff, food and drinks delicious, excellent service onboard"
Cons: "At Denver assistance hadn’t been arranged"

Cons: "Only bathroom on the plane was closed due to issues. Plane was cold and cramped."

Cons: "All went well."

Pros: "Nothing"
Cons: "When I spoke to the United person last week to confirm baggage and carry on requirements. He said I could take a carry on when I turned up to the gates I was charged another fee for my carry on bag. What is baffling is that when I arrived at Denver people were getting complementary check in baggage. I’m so dissatisfied with the booking and the amount it has now cost me ruining any savings I’d had for sanfrancisco"

Cons: "We need to stop turbulence, it freak me out."

Pros: "On time."
Cons: "Could my knees get just one more inch? Why am I tolerating a seat designed for a short person?"

Cons: "Crowded planes."

Cons: "Delta Global Services is the contract company for UA and Delta in MISSOULA. After a great flight to MSO from Denver, we have been sitting in the plane while DGS tried to figure out how to get us off the plane. No management is here to make decisions. Horrible company that is managing United’s flight"

Pros: "The flight started with 7 min delay for one crew not showing up. Eventually we had to wait on the plane for one hour for the plane to fly"
Cons: "contacted customer service 3 times while the first 2 times over the phone and was promised to get a $100 travel voucher in 24-48 hours. Never got that. When called 3rd time I was asked to email their support which I did and one week have passed and nobody bothered to respond yet. Typical United!"

Pros: "Everything was on time and all the staff were professional and friendly"

Pros: "The variety of movies"
Cons: "No daily wifi"

Pros: "One if the bathrooms was closed and a second one had no running water."

Cons: "Late by 3 hours"

Pros: "It left on time and arrived early."
Cons: "One of the flight attendants was particularly snippy with everyone."

Cons: "The ground crew seems not to have a good understanding of the available over-head space and asks passengers to checks bags in unnecessarily. For the second time in a row, I was told that there is no overhead space left and that I need to check my bag while I was boarding. I saw that this wasn't the case when I got on board. Needless to say that waiting to pickup my carry-on at my destination added an unnecessary half an hour to my trip."

Cons: "Lost bags and every time I called to find out where they were I would get a different story. I was told it would be on the next flight for the next 5 flights."

Pros: "Repairs caused a long delay, they kept us informed but it was a hurry up and wait forever"

Pros: "View"
Cons: "Over an hour delay"

Pros: "Sat by united pilot who was just on flight to go to training and was with my 10 mo old daughter and was absolutley wonderful, so helpful and Im sure it was not an ideal situation for him. On second flight we sat next to flight attendant and a trainee and made our first flight trip... that could have been awful great! Big thanks to all the staff."

Cons: "Delay in connecting flight from Seattle to Denver caused us to board our plane to Grand Rapids moments before the doors closed. Had we missed our flight, an unpaid work day would have incurred as we would not have arrived in Grand Rapids until the following afternoon."

Pros: "I liked the legroom of Economy Plus. The flight itself was good. Didn't buy any food."
Cons: "We arrived late in Denver and had to sit at the gate and wait for the jetway person to arrive and connect the jetway to the plane. I also didn't like the fact that I had to buy Economy Plus because my wife and I were not only not assigned seats together after booking, we were not assigned seats at all. When I booked the flights I was only allowed to choose seats for the first flight - Charlotte to Houston...but not for the other three legs of our Charlotte to Seattle trip. The only two seats together from Houston to Seattle were in the very last row. And, on our return flight we had to purchase Economy Plus in order to sit together."

Pros: "Nice customer service"
Cons: "Flight was delayed 5hrs because there was no plane available to take us to our designation. Only flown united 2 other times and similar things happened on those flights as well. Definitly won't be booking with united again"

Pros: "Flight was smooth and on time"
Cons: "The boarding gate attendants were rude and uncaring when we asked them to help us switch pre-assigned seats to ensure our two year old sat with us. While we might have understood better had they been empathetic, they were rude and uncaring and said when you book online you sign a waiver and they can not do anything about this. Wow. This was our flight back. Originally on the way to our destination we had used Delta and that customer service experience was completely different even though that flight was full too. Never flying United again as long as I can avoid it."

Pros: "The flight"
Cons: "The time"

Cons: "The fact that I was stranded in Colorado due to weather and they would not refund my ticket even though I had purchased insurance. They wouldn't even give me a credit. Will have to think twice about doing business through KAYAK and United from now on."

Cons: "Failed to put my bag on the flight even with ample preflight time, simply irritating"

Pros: "Suitcase arrived at the carrousel on time , much better than Houston."

Cons: "No power in seats, no in-flight TV/movie without paying, but a short enough flight it was okay."

Pros: "Everyone was friendly."
Cons: "The first plane was scary. Very bumpy and very small. No leg room and very hot."

Pros: "My bagoal was pretty badly handled and caused damage that needs to be replaced. Third time flying with United where something like this has gone wrong. I won't be flying this airline again."

Pros: "Absolutely nothing good to say. Unaccommodating plane and crew."
Cons: "Absolutely nothing good to say. Unaccommodating plane and crew. Pay a little more and don't fly United"

Pros: "Flight was on time and boarding was smooth"
Cons: "Full plane it felled very cramped."

Pros: "Good flight, good crew"

Pros: "Blonde in front of me :)"
Cons: "There is no plug in"

Pros: "The complimentary beverage"
Cons: "Seat space keeps getting smaller. My seat did not recline at all"

Pros: "That I was able to find a cheap seat to come home for a family emergency even though the seating was tight."
Cons: "The scheduling was really tight. Had to basically run from gate 25 to gate 82 to catch my flight to Nebraska. And then I realized this was the same the last time I flew this route a couple years ago around Christmas. Too close. Good thing I'm in shape."

Cons: "Unreliable wifi."

Pros: "Very friendly and helpful staff."
Cons: "The fact that we had a connecting flight to minot from Denver. Arrived late to Denver because of weather, but my stroller that I had left on the jetway in Seattle was never put on the plane which I didn't know until I got to minot. I was going to wait for it in denver, but I would have missed my flight to minot had I waited 5 more minutes. We arrived to minot only to find out that our 3 suitcases, one stroller and 2 car seats were never in the flight. Awful! And my connecting flight was even delayed an extra 55 min so I don't quite know where my things are."

Pros: "crew was very friendly and patient."
Cons: "flight was delayed. also received text message that bag was on different and would be late. bag actually arrived as it should have, text message of delay was in error and caused confusion."

Cons: "Your email stated that my departure gate for my connection was B87. It was actually B80. There were no message boards in that area of airport (commuter planes). I missed my flight because of it. Luckily there was a van shuttle that I was able to catch but the ride was 4 hours in the night and cost an additional 80.00. I would like Kayak to reimburse me the 80.00 I had to pay extra. Thank you"

Cons: "Could not get seat assignment 24 hrs in advance. Website said see desk. Phone call to United said pay more $ get a seat. Had to check in twice, once with bags...still no seat...wait in line again at gate for seat."

Pros: "We incountered quite a bit of turbulence. The captain kept us informed and did his very best to assure a smooth flight."
Cons: "Can't complain."

Pros: "Complimentary beverage and snack"
Cons: "Had to stay about 30 minutes in the plane after it has landed. Almost caused everyone late to the connection flight."

Pros: "Easy flight"

Pros: "Quick boarding"

Pros: "New plane, wifi, arrived 27 mins early"

Pros: "Plane interior was bright and new."
Cons: "Baggage retrieval. Chairs don't recline."

Pros: "Plenty of leg room."
Cons: "Everything must be bought from Frontier. There are no complimentary items. Blankets and pillows were not available either."

Pros: "Family emergency caused us to stay 4 more days -"
Cons: "No credit offered"

Cons: "Long line at check in"

Cons: "The airline charges extra for things that most airlines provide as part of the ticket price. The ticket was not cheaper than other airlines to compensate for the additional charges: carry-on fees, choosing a seat, snacks and beverages, etc. We were delayed with no explanation; it's nice to be kept informed when that happens. Crew was fine but I won't choose Frontier again because of the additional charges for things that should be included in a competitive ticket price."

Pros: "Prive"
Cons: "Seats were very uncomfortable. My knees hurt from position."

Pros: "Not much. It got us there"
Cons: "Charge for everything. No frills airline."

Pros: "Love frontier plan ahead for backage read the fine print"

Cons: "No complimentary food or beverage service"

Cons: "None"

Cons: "No one at Frontier desk. Sign stated to check in at kiosk or online, but there were no kiosks. Online check in was unnecessarily long and onerous, and then last step couldn't be completed; advised to download app. Then had to repeat process with app. Then had to go back to desk to drop off luggage; still no one there, very long long formed, and finally when someone came to the desk the line took 20 minutes. Every other airline has figured out how to avoid this!"

Pros: "Cheap, kind of"
Cons: "No food, no water, no recline, no relax, no hospitality"

Cons: "Did not make the flight and the insurance did not cover the flight cancelation so......pissed."

Cons: "Unexpected fees on carry ons, should be more clear about charges. Tiny trays couldn't for my snack and drinks even. Won't fly with frontier again"

Cons: "Should have flown Virgin America."

Cons: "WAITING FOR A PASSENGER TO BE REMOVED FOR BEING DISORDERLY (ALCOHOL ABUSE?)"

Cons: "online internet didn't work for boarding pass, at the airport there were 4 monitors only 1 worked and that worked marginally, the info on luggage rate and seating not clear, make it bigger so people are well informed It was not clear on the carry on price either the night before or at check in no one was staffing the check in desk, we waited there more than an hour, took an hour to get the internet to work Crew wanted me to buy a bottle of water when I asked for another small cup of water"

Cons: "Uncomfortable and everything was delayed. Overall terrible"

Cons: "In complete honesty, Everytime my wife and I have flown frontier, they have either been delayed, or we have sat on a runway for an hour waiting for a gate because of a delay. It is unfortunate. I feel that they are understaffed, and in the past we have said we would try not to fly them again. I feel after this trip we will make that happen."

Pros: "I got home safely"
Cons: "Both flights were over an hour and a half late. The seat designer should be arrested! Drinks and snacks were beyond "overpriced"!!"

Pros: "Quick boarding"
Cons: "Paying for carry on luggage."

Pros: "Nothing"
Cons: "Carry on fee?!?! WTF!!!"

Cons: "I was bringing back Some frozen Salmon and some crab for my brothers Birthday ,And they lost the bag and i spent 2 hrs on the phone and was told it would be here the next day and still no responce????"

Cons: "hidden costs ....at the end-of-the-day, you are no low-cost."

Pros: "stewardess was excellent/funny"
Cons: "too cramped. to get additional legroom it is more money."

Pros: "The staff was kindly and it moved swiftly."

Cons: "Hour late,"

Cons: "It is a sad state of affairs to charge $40 -45 To carry a weekend bag on board."

Cons: "First time on Frontier. When I purchased ticket I didn't know I would have to pay $35 for a carry on (until I checked in online for my flight). Once that factored in, I paid way more for the ticket than others. Boarding Was a debacle because of those who didn't understand the carry on policy. Obviously the gate attendants were tired of angry customers who didn't realize they had to pay and were angry. We were late taking off because of it."

Pros: "Everyone was very nice and pleasant"

Pros: "Nothing in particular stood out"
Cons: "Cost of ~49 $ extra for a carry on. This adds 90$ to trip. I would have choose another airline if I had known this was the ask."

Pros: "It's cheap"
Cons: "Malfunctioning toilet, delayed travel, costly bag check in, have to check in carry on"

Pros: "Nothing"
Cons: "Everything"

Pros: "Flights on time"
Cons: "No drinks served on Denver to Tampa flight"

Cons: "Paying up to $60 for a carry on. Waiting on the runway for 30 minutes with no communication from the pilot when we landed in Denver."

Pros: "Pilots"
Cons: "Service"

Pros: "Cost"
Cons: "6/11/2016- stuck on Tarmac for no reason for over an hour. Missed last shuttle to Boulder due to waiting on luggage at baggage claim for another 2 hrs. Unacceptable!!!"

Cons: "they didnt refund me they only gave me credit voucher w frontier who i never see using as an airline again. almost didnt refund me directly for the carry on bag $30 which i cancelled obviously. sends me two delays right before I'm getting to leave, rebooked a flight w alaska"

Cons: "Delayed forced me to rebook with different carrier last minute"

Pros: "Nothing"
Cons: "Staff is rude, not considerate at all"

Cons: "Should at least offer water(for free) to passengers"

Cons: "I was charged $35 each way to bring a carry on bag. It would have been nearly twice that had I not checked the email the night before my flight and pre paid. I call that slimy. Seats were tiny, hard and did not recline. Won't book with them again."

Cons: "Hit a bird and had to return to the airport."

Cons: "They nickel and dime you to death. Leg room is horrible if your over 4 feet tall."

Pros: "Price was right for a last minute fare. Quick boarding. Great crew."
Cons: "SEATS ARE HORRIBLE! I'm not very tall, 5'10", and I could not move, with my knees jammed into the seat in front. Good thing it was only a 2 hr flight. I despise having to pay extra FOR EVERYTHING. Luckily my trip is only three days (for a sudden unexpected family funeral) and didn't bring much, so my bag fit under the seat...$60 to have regular carry on round trip?!? CRAZY!"

Pros: "All was good!"

Pros: "Getting off the plane."
Cons: "Everything else."

Cons: "They charged me for my carry on at the gate!"

Cons: "Charging for water? Really?? Charge me a carry on fee, a checked luggage fee and forcing me to pay a carry on fee for my PERSONAL ITEM that fits under the seat??? You've got to be kidding me."

Pros: "I did appreciate the low fare."
Cons: "Its weird to keep seeing all the things you have to pay extra for that other airlines just provide."

Pros: "The spirit employees were very helpful when I checked in"

Pros: "Nothing"
Cons: "Everything"

Pros: "The price"
Cons: "Communication"

Cons: "Spirit is unorganized and understaffed"

Cons: "20 min Delayed departure"

Pros: "Modern plane"
Cons: "Hideen fees for luggage and seating"

Pros: "Got what paid for"

Cons: "Everything"

Pros: "Price was right"
Cons: "Reserved my seat but didn't get it; cramped."

Cons: "I wasn't flying to hawaii"

Pros: "It was better than Frontier Airlines."

Cons: "charge too expensive for baggages.delay too long."

Cons: "Very uncomfortable ride. We a t-shirt hard ,zero leg room"

Pros: "They suck so bad!!!"
Cons: "They just suck really bad!!!"

Pros: "I enoyed my flights to Seattle and back to los Angeles"

Pros: "very good service and price,"

Pros: "Nothing"

Pros: "Nothing!"
Cons: "The plane was delayed! They have all these secret fees"

Pros: "Planes were new and clean."
Cons: "Airport was disorganized. Check in was long and a mess at 8:30 in the evening. Long lines. Staff not helpful. No checkin kiosk to get bag tag. Probably will not fly Spirit again."

Pros: "O"
Cons: "BEFORE YOU GET ON THE PLANE SO MUCH EASIER ON DELTA I WILL NOT BE BACK"

Pros: "Like the convenience of the flights between Las Vegas and Denver. The ratings above you need to have a N/A for non applicable. We all know there's no entertainment. And the food is overpriced ! But"
Cons: "See above answer"

Pros: "Needs more room. Packed like sardines"

Cons: "Constant pitching and threatening about paying for bags. Constant yammer on the plane about offers etc. Money, Money, Money is all they talk about!!!!"

Pros: "Good seat, enough room"
Cons: "Cost for food"

Pros: "Nothing"
Cons: "Fees, late arrival"

Pros: "Price was good. i ]will fly Spirit whenever possible and I will rnecomend often"
Cons: "Delay other than I did get a reminder ."

Cons: "Flights delayed multiple times both ways."

Pros: "The whole experience. Very friendly."
Cons: "No complaints"

Cons: "I would walk before I flew spirit airlines ever again"

Cons: "Seating arrangement is horrible your legs are in front of your face"

Pros: "All was great but the extra large seat did not recline?"

Cons: "please see my scathing 1x page long review to feedback"

Cons: "Did not do final leg"

Pros: "Zero."
Cons: "everything."

Pros: "We made it to our destination."
Cons: "My luggage was lost and I'm without any belongings for myself or my 1 yr old baby!"

Pros: "I liked the bundle prices on drinks."
Cons: "No monitors behind seat headrests or wifi and arm rests became very uncomfortable"

Pros: "Nothing"
Cons: "Everything"

Cons: "Payment for drinks"

Cons: "So late!"

Pros: "the service was wonderful, the l8nes wwnt by quickly"

Pros: "No frills or hassles"

Pros: "Everything went well from beginning to end."
Cons: "I have no complaints"

Pros: "Price"
Cons: "Managed to catch a virus so couldn't travel (doctor's orders). Partial credit was given when I'd much rather just have a refund."

Cons: "Multiple delays."

Pros: "The pilot made jokes about how cheap spirit airlines is."

Pros: "Low cost"
Cons: "Crowded seating"

Pros: "The good price and straightforward process"
Cons: "The delay but it happens"

Cons: "The plane smelled overwhelmingly like urine."

Cons: "Delayed like many spirit flights I have been on in the past"

Pros: "The ticket price was wonderful."
Cons: "Paying for luggage, seat, etc. - everything is an up charge."

Read more about Alaska Airlines
COVID-19 information

Safety measures for airlines flying from Seattle to Denver

Airlines flying from Seattle to Denver 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 Seattle to Denver

Mandatory masks

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

Social distancing seating

Middle seats unavailable to book on flights from Seattle to Denver

Pre-flight testing

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

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7/16
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3h 06m
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Recent one-way flight & train deals

7/8
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2h 47m
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10/6
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nonstop
Alaska Airlines
2h 33m
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7/15
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2h 43m
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2h 43m
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6h 10m
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10/3
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2h 38m
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7h 59m
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6/22
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13h 43m
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8h 57m
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55h 53m
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