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DEN - SEA

Find cheap flights from Denver to Seattle from $29

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Denver to Seattle departing on 4/30. 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
0 bags
Sat 5/11
Sat 5/18

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

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Denver to Seattle.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Denver to Seattle.
In the last 7 days travelers have searched 46,099,007 times on KAYAK, and here is why:

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Cheap flight deals from Denver to Seattle (DEN-SEA)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Denver to Seattle 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 and deals for you by selecting your travel dates.
Choose your dates
6:25 pm - 8:35 pmDEN-SEA
3h 10mnonstop
2:55 pm - 6:42 pmSEA-DEN
2h 47mnonstop
$58Frontier
Find Deal
Tue, Apr 30 - Sat, May 4
6:25 pm - 8:35 pmDEN-SEA
3h 10mnonstop
9:35 pm - 1:25 amSEA-DEN
2h 50mnonstop
$60Frontier
Find Deal
Tue, Apr 30 - Tue, May 7
2:49 pm - 4:58 pmDEN-SEA
3h 09mnonstop
9:32 pm - 1:22 amSEA-DEN
2h 50mnonstop
$65Frontier
Find Deal
Wed, May 1 - Sat, May 11
2:49 pm - 4:58 pmDEN-SEA
3h 09mnonstop
2:55 pm - 6:42 pmSEA-DEN
2h 47mnonstop
$66Frontier
Find Deal
Wed, May 1 - Sat, May 11
7:25 pm - 9:34 pmDEN-SEA
3h 09mnonstop
9:32 pm - 1:22 amSEA-DEN
2h 50mnonstop
$67Frontier
Find Deal
Fri, May 3 - Sat, May 4
2:49 pm - 4:58 pmDEN-SEA
3h 09mnonstop
9:35 pm - 1:25 amSEA-DEN
2h 50mnonstop
$68Frontier
Find Deal
Wed, May 1 - Tue, May 14
9:45 am - 11:45 amDEN-SEA
3h 00mnonstop
10:08 pm - 1:51 amSEA-DEN
2h 43mnonstop
Thu, Jul 18 - Sun, Jul 21
9:16 pm - 8:35 amDEN-SEA
12h 19m1 stop
9:35 am - 6:08 pmSEA-DEN
7h 33m1 stop
Sat, May 11 - Wed, May 22
6:15 pm - 7:40 amDEN-SEA
14h 25m1 stop
11:45 pm - 5:00 pmSEA-DEN
16h 15m1 stop
$171Sun Country Air
Find Deal
Sat, Apr 27 - Sun, Apr 28
7:55 pm - 10:00 pmDEN-SEA
3h 05mnonstop
7:35 pm - 11:17 pmSEA-DEN
2h 42mnonstop
$187Delta
Find Deal
Fri, Jun 7 - Tue, Jun 11

Flights from Denver to Seattle - Travel Insights & Trends

Get data-powered insights and trends into flights from Denver to Seattle to help you find the cheapest flights, the best time to fly and much more.

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

The average price of all flights from Denver to Seattle clicked on KAYAK for each day over the last 12 months.
If your flying dates are flexible, you should consider flying to Seattle on a Tuesday, as we generally find the cheapest rates on that day for this route. On the other hand, Sunday is the most expensive day to fly from Denver to Seattle. For your return ticket, we recommend flying on a Wednesday and avoiding Sundays for the best deals.

What is the cheapest month to fly from Denver to Seattle?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Denver to Seattle, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Denver to Seattle is February, where tickets cost $148 on average. On the other hand, the most expensive months are June and July, where the average cost of tickets is $298 and $288 respectively.

How far in advance should I book a flight from Denver to Seattle?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Denver to Seattle, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Denver to Seattle, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 30 days before departure.

Which airlines provide the cheapest flights from Denver to Seattle?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 72 hours, the cheapest one-way ticket from Denver to Seattle found on KAYAK was with Frontier for $29. Frontier proposed a round-trip connection from $58 and Sun Country Air from $171.

Which airlines fly most frequently between Denver and Seattle?

Alaska Airlines connects Denver to Seattle with up to 6 flights per day. United Airlines also offers 6 flights per day, while Delta follows with 5 flights per day.

Which airlines fly non-stop between Denver and Seattle?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for flights from Denver to Seattle.
There are 5 airlines that fly nonstop from Denver to Seattle. They are: Alaska Airlines, Delta, Frontier, Southwest and United Airlines. The cheapest price of all airlines flying this route was found with Frontier at $41 for a one-way flight. On average, the best prices for this route can be found at Frontier.

How many flights are there between Denver and Seattle per day?

Each day, there are between 20 and 26 nonstop flights that take off from Denver and land in Seattle, with an average flight time of 3h 00m. The most common departure time is 7:00 pm and most flights take off in the morning. Each week, there are 165 flights. The most frequent day of departure is Friday, when 16% of all weekly flights depart. The fewest flights depart on a Saturday.

Which cabin class options are there for flights between Denver and Seattle?

The average price of flights for each cabin class for the route found by users searching on KAYAK over the last 2 weeks.
There are 4 cabin class options for the route. These are First, Business, Economy and Prem Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

How long does a flight from Denver to Seattle take?

Direct flights cover the 1,022 miles separating Denver to Seattle in about 2h 57m.

What’s the earliest departure time from Denver to Seattle?

Early birds can take the earliest flight from Denver at 5:01 am and will be landing in Seattle at 7:04 am.

What’s the latest departure time from Denver to Seattle?

If you prefer to fly at night, the latest flight from Denver to Seattle jets off at 10:20 pm and lands at 12:10 am.

Good to know

Low season

January

High season

July

Cheapest flight

$29
Best time to beat the crowds with an average 27% drop in price.
Most popular time to fly with an average 38% increase in price.
Flight from Denver to Seattle

When to book flights from Denver to Seattle

Are your dates flexible? Find out the best times to travel from Denver to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Denver to Seattle

  • Which is the best way to get to downtown Seattle from SEA?

    The distance from SEA to the city center of Seattle is approximately 13.8 miles. A light rail provides the best way to travel between these two distances, taking about 40min to complete the journey. Another option is to hop onto the airport shuttle, which takes around 1h to commute from SEA to the city center of Seattle. If you want to get there in under 25min, a taxi is handy.

  • Which family-friendly amenities are the SEA?

    Seattle-Tacoma International Airport (SEA) has rooms where moms can pump or breastfeed in privacy. These facilities are situated in Concourse D on the lower level of D Annex and Concourse N on the Mezzanine level. Also in these rooms are comfy chairs, electrical sockets, and sinks.

  • Which airline allows pets on board from DEN to SEA?

    Passengers flying American Airlines will be glad to know that the carrier allows you to bring pets like cats and dogs in the cabin when traveling from DEN and SEA. Remember to carry their health documents and vaccination certificates; you must restrain them in their cages during the trip.

  • Where can I withdraw money at SEA?

    Various banks and credit unions run their ATMs at SEA, making it easy for arriving travelers to recharge their wallets. They’re situated on Concourse A and in the Baggage Claim.

  • Does Denver International Airport offer any amenities for pets or service animals?

    In addition to having several indoor pet relief areas in Terminals A, B, and C of Denver International Airport, there is an outdoor relief zone that can be found in Jeppesen Terminal. Each of these areas contains grass, secure fencing, soap, running water, and waste disposal bags. There is also a 4 Paws Pet Resort that is connected to the airport via a free shuttle and provides boarding and grooming services for animals.

  • Do any airlines have lounges for their customers at Denver International Airport?

    Both American Airlines and Delta Airlines have lounges located in Concourse A of Denver International Airport in the Departures terminal. Additionally, United Club has two lounges that can be found in the airport’s East Wing and West Wing, and they also offer an annual membership program.

  • Are there any shower facilities at Seattle-Tacoma International Airport?

    To take a quick shower after your plane has landed, go to the Delta Airlines Sky Club between Gates S8 and S9 in Seattle-Tacoma International Airport. This lounge allows travelers to buy entry tickets at the door and has shower stalls, hairdryers, towels, and toiletry kits that contain shampoo and soap.

  • Where can I rent a car at Seattle-Tacoma International Airport?

    To rent a car from Seattle-Tacoma International Airport, go to the Rental Car Facility by taking the free 24h shuttle that departs from outside of the Arrivals terminal. Several major rental companies can be found in this center, including Budget and Enterprise, and most of them keep their cars on-site or provide free transportation to their parking garage facility.

  • What is the cheapest flight from Denver to Seattle?

    In the last 3 days, the lowest price for a flight from Denver to Seattle was $29 for a one-way ticket and $58 for a round-trip.

  • Do I need a passport to fly between Denver and Seattle?

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

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

    Denver and Seattle are both served by 1 main airport. You will leave Denver from Denver Intl and will be arriving at Seattle/Tacoma Intl.

  • Which airlines offer Wi-Fi service onboard planes from Denver to Seattle?

    Alaska Airlines, Air Canada, and United Airlines offer inflight Wi-Fi service on the Denver to Seattle flight route.

  • Which aircraft models fly most regularly from Denver to Seattle?

    The Boeing 737-800 is the aircraft model that flies most regularly on the Denver to Seattle flight route.

  • Which airline alliances offer flights from Denver to Seattle?

    oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between Denver and Seattle, with SkyTeam being the most commonly used for this route.

  • On which days can I fly direct from Denver to Seattle?

    There are nonstop flights from Denver to Seattle on a daily basis.

  • Which is the best airline for flights from Denver to Seattle, Alaska Airlines or Delta?

    The two airlines most popular with KAYAK users for flights from Denver to Seattle are Alaska Airlines and Delta. With an average price for the route of $229 and an overall rating of 8.1, Alaska Airlines is the most popular choice. Delta is also a great choice for the route, with an average price of $216 and an overall rating of 8.0.

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

    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 Denver to Seattle.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Denver 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 Denver to Seattle?

    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 Seattle with an airline and back to Denver with another airline. Booking your flights between Denver and SEA can sometimes prove cheaper using this method.

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

    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 Seattle from Denver up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding a cheap flight from DEN to Seattle

  • Looking for a cheap flight? 25% of our users found flights on this route for $102 or less one-way and $136 or less round-trip.
  • Travelers with scheduled early morning flights via Denver International Airport (DEN) should consider spending a night in one of the numerous hotels around this facility. Typically, such facilities provide complimentary cars to and from the airport, making it possible to be at the terminal in time for your flight. Such hotels include Embassy Suites by Hilton Denver International Airport.
  • Denver International Airport (DEN) features only one terminal, the Jeppesen Terminal, complimented by three Concourses, A, B, and C. This terminal includes check-in facilities, security checkpoints, customs, immigration, and luggage claims. The concourses are reserved for departures. Movement between the terminal and the concourses is via The Automated Guideway Transit System, which departs at a 5-15min interval.
  • Families traveling using Denver International Airport (DEN) will be glad to know that the property caters to the needs of moms and the smallest of the family members. Lactating and nursing rooms are situated after security in every concourse from where you can pump and breastfeed in privacy. Also, the rooms feature sinks, power sockets, and comfy seats.
  • Suppose you wish to say a prayer before departing from DEN to Seattle-Tacoma International Airport (SEA). In that case, you’ll find a prayer room at this facility. Situated away from the noisy terminals, this sacred sanctuary sits in Jeppesen Terminal, Level 6 East, and it runs between 4 am and midnight every day. The room includes an Islamic Masjid and an inter-faith chapel.
  • If you’ve arrived at DEN and wish to drop off your car before flying out to Seattle-Tacoma International Airport (SEA), you won’t have a shortage of options to meet your needs. DEN offers different levels of parking, including garage, economy, short-term, and long-term. Economy parking is located on the east side of Jeppesen Terminal, and shuttles depart every 10min to get you there.
  • Both United and Delta Airlines offer flights from Denver to Seattle that provide travelers with comfortable seats and additional legroom, as well as in-flight entertainment. If you would like to check your suitcases for free and receive complimentary snacks, opt for flying with Southwest Airlines instead.
  • If you’re traveling to Seattle for an important meeting or workshop, stop by the business center that is near the B Gates of Denver International Airport (DEN). This center provides guests with private workstations, copying services, shipping supplies, and access to the airport’s high-speed Wi-Fi.
  • To pass the time before your flight from Denver to Seattle begins boarding, go to the ZooX Public Internet Kiosk Systems in the Jeppesen Terminal of Denver International Airport. These booths allow travelers to play video games for $0.15 per minute, with a minimum payment of $3.
  • Hoping to leave one of your bags at the airport while you explore? Go to the Smarte Carte Baggage Storage desk between baggage carousels 12 and 13 of Seattle-Tacoma International Airport (SEA). In addition to offering baggage storage for $8 to $22 per item per 24h, this center also has notary and fax services.
  • To de-stress after a long day of travel, stop by the Massage Bar near the N gates of Seattle-Tacoma International Airport. 15m massages start at $18, with 30m massages costing $43. You can also have an express foot massage for less than $20.
See more tips

Prefer to fly non-stop from Denver to Seattle?

Find which airlines fly direct from Denver Intl to Seattle/Tacoma Intl, which days they fly and book direct flights.

Nonstop departures

Denver Intl to Seattle/Tacoma Intl

Monday

ANA, Air France, Air Tahiti Nui, +16 more

ANA, Air France, +17 more

Tuesday

ANA, Air France, Air Tahiti Nui, +17 more

ANA, Air France, +18 more

Wednesday

ANA, Air France, Air Tahiti Nui, +15 more

ANA, Air France, +16 more

Thursday

ANA, Air France, Air Tahiti Nui, +16 more

ANA, Air France, +17 more

Friday

ANA, Air France, Air Tahiti Nui, +16 more

ANA, Air France, +17 more

Saturday

ANA, Air France, Air Tahiti Nui, +16 more

ANA, Air France, +17 more

Sunday

ANA, Air France, Air Tahiti Nui, +17 more

ANA, Air France, +18 more

See more direct flights

Nonstop returns

Seattle/Tacoma Intl to Denver Intl

Monday

ANA, Air France, Air Tahiti Nui, +16 more

ANA, Air France, +17 more

Tuesday

ANA, Air France, Air Tahiti Nui, +17 more

ANA, Air France, +18 more

Wednesday

ANA, Air Tahiti Nui, Alaska Airlines, +16 more

ANA, Air Tahiti Nui, +17 more

Thursday

ANA, Air France, Air Tahiti Nui, +17 more

ANA, Air France, +18 more

Friday

ANA, Air Tahiti Nui, Alaska Airlines, +16 more

ANA, Air Tahiti Nui, +17 more

Saturday

ANA, Air France, Air Tahiti Nui, +17 more

ANA, Air France, +18 more

Sunday

ANA, Air France, Air Tahiti Nui, +17 more

ANA, Air France, +18 more

See more direct flights
See more direct flights

Top 5 airlines serving from Denver to Seattle

 
See real verified KAYAK customer reviews for airlines flying from Denver to Seattle. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Denver to Seattle? 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.
8.1
Alaska AirlinesOverall score based on 9065 reviews
8.2boarding
8.6crew
7.3entertainment
7.3food
7.9comfort
Airline reviews

The flight crew was super friendly. All flights were on-time. Everything went smoothly!

10.0 ExcellentSarah, Apr 2024ATL - SEA
Read more about Alaska Airlines reviews

The flight crew was super friendly. All flights were on-time. Everything went smoothly!

I am an avid customer to Alaska Airlines and I was so disappointed with my flight experience on flight 639 with service from Phoenix to Seattle. This flight was supposed to take off at 7am. We sat on the airplane for an hour before we had to deplane due to a mechanical issue, which is fine. The agents working at the desk let us know that they would update us every 30 minutes with new information about our flight and that at the moment they were only helping customers who, due to the delay, would miss their connecting flights in Seattle, which was understandable. 1.5 hours went by before we got our first update of “unfortunately there is no update” finally, after 3 hours of waiting with hardly any update, I got in line with the rest of the passengers to figure out my next move due to the fact that I was supposed to be at a wedding that night and that I had spent a lot of money to make that morning flight. After sitting in line for over an hour to get help, I decided to call customer service to see if they could help me rebook a flight just in case, to which the agent said she could rebook me for a flight at 3:31pm that had 3 seats left on the flight. So I took it with the hopes that I would at least make the dinner portion of the wedding. I spoke to the gate agent and asked how I could retrieve my bags and he said they will be moved over to my new flight (2 gates down). Finally after being at the airport for 10 hours, it was time for me to hop on my new flight before I came to find out that I was on the standby list after being told that I had 1 of 3 seats that were left. I went and talked to the new agent to which he said, “yeah sorry there was a family who was after you on the waitlist so we gave them priority, so now there are 3 people ahead of you so you may actually not get on this flight.” All I could think about was how frustrated I was that I paid over $400 for a flight to get told that I may not make it home anytime soon. Finally, somehow a kind person gave up their seat for me to get on with compensation for him. When I mentioned that I had been at the airport since 5am (10+ hours) verbatim the gate agent said, “yeah that sucks, but it happens” absolutely no sympathy or support whatsoever. I then asked about my bag and if it was moved to this flight and the gate agent told me “they may not have had time to move it over so you might not get your bags today” so from my understanding from 11am when I changed my flight until 3:31pm my bag didn’t have time to move two gates? That seems ridiculous. Luckily I checked my app and it showed that it was moved. It was a long day of terrible customer service, no updates for new flights, long wait times, no compensation besides $12 for food that I didn’t even receive to my email until I landed in Seattle, having to wait 35 minutes for my bag at baggage claim upon my arrival in Washington, all to miss a wedding that I should have been a huge part of. So disappointing for someone who religiously flies with Alaska and has 4 or 5 more trips over the next few months with the airline and not a single dollar or mile returned for poor service.

Good! Although I wish I didn’t have to check my bag at the gate, when I got on the plane there was plenty of room for the bag.

The cabin stewart took care of my garment bag and then made sure I did not forget it on my way out. The stewardess gave me water after I missed the earlier service (I was asleep). I received good service overall.

It was a great flight and the flight crew was very helpful and professional.

The ladies at the ticket counter (at least I think they were ladies) gave me bad information about the closing of the gates at thirty minutes before schedule takeoff and, therefore, I had only ten minutes to get through Checkpoint Charlie and to the gate in order to make the flight. I got there a minute or two after that thirty-minute window but was able to board easily. I noticed that many boarded much later than I did. So that closing the gates thirty minutes before takeoff was not true. The service was superb on the plane. The flight attendants were as nice as can be. The flight was very comfortable.

Too small of seats. In Philly I ordered a wheelchair and it was not ordered for Seattle. Also, stop letting cleaning people in until EVERY paying customer has disembarked the plane!

I like the crew, very kind. However, there was not a place to plug in devices at one's seat. Also, I had asked for a dairy free meal, been told I would have one, and it was as though no one had heard of that.. Thankfully, I was able to pick through and find something to eat because of the options.

Held up on the first leg of our flight the captain asked everyone to remain seated so that we and two others could deplane quickly to catch out tight connection which we did successfully.

It was smooth all the way, the flight, the boarding, and gating.

It was a Red-Eye flight so was not comfortable enough to sleep, but seat was as expected. Crew was great and in-flight entertainment was excellent. Flight was smooth

Standard economy seats on Deltas 767 were better than Alaska premium seats on their 737 MAX9; more legroom, wider seats. Entertainment was great, no ipad or phone required. Could have included a meal service.

Plane was turned around due to fog half way into the flight, Delta did not properly direct passengers to stay on same flight and instead failed to properly rebook on Alaska

The boarding process was terrible especially with an indirect flight Chicago to Seattle to San Diego was terrible talking about we overbooked a flight idk if I’d take this airline ever again we got off our flight from Chicago to Seattle and we traveled for business and they told us our connecting flight was over booked and their was no seats asking people to take a delayed next flight and they don’t tell anyone coughing to wear masks seats 30A-B were terrible during the flight no one wants to sit next to people coughing all around I don’t want to be sick traveling for work or get sick anytime it’s very upsetting the staff doesn’t take this stuff serious to tell them to wear masks when they see people coughing and sneezing

Flight was on time, the crew was personable & professional, & the plane arrived early which was nice.

This flight landed early, but deplaned late. We were stuck sitting and waiting for a gate for over an hour

My flight was very clean and the location was comfortable. The service was great. A satisfying flight!

I appreciated being upgraded. I was very disappointed with my 13 hr layover in Seattle to geg, while my friends who flew Alaska made it home as scheduled. I had to reserve a hotel on my dime.

Delta needs to step up the meals and snacks. They have been serving the same two meals for three years.... It is time to change it up.

Really liked the choice of the 4 free snack options. Crew great. Good vibe on plane.

Too many fees (but that seems to apply to all airlines nowadays)

Flight was on time. Staff were friendly. I paid for Economy Plus but was required to check my standard carry-on luggage due to lack of space on the aircraft. This cost me 30 minutes, unexpectedly, in waiting at the baggage claim. This experience did not meet my expectations.

Everything was very good. Boarding and takeoff were on time and organized. Had a good flight

Wheelchair assistance was not complete. The person left me at the departure gate without informing the groundstaff of my requirements. I had to walk to the departure counter to ask for help to reach the plane door. The crew informed me that in future they were not allowed to help passengers like me, senior citizen and Wheelchair passenger with placing their carry on bags in the overhead compartments!

Flight was delayed by over an hour and gate checked bags took 15 minutes to be delivered to the jet bridge.

Seats are way too snug for my hip to knee ratio and the recline on the seat in front of me made my experience worst. My legs had no room at all. Not a plane for people 6 ft or over unless you fly first class.

Our flight was delayed many times throughout the day. The final delay was about 8 hours. I spent time in line to speak to someone at their understaffed desk, and also spent time waiting online and then chatting with a service rep. None of the United employees were any help at all. I desperately wanted to go get rest and possibly re-book my trip but I was denied any compensation or voucher for a hotel. I was repeatedly told it was not United's fault and therefore they had no compensation to offer. Overall, a cold and callous experience.

Delayed for maintenance issue?? Should have been addressed before boarding. Put my bag on an earlier flight, but didn’t ask if I wanted to change to an earlier flight. Arrived to find my bag locked up and no agent to be found when I landed.

Flight crew and pilots did great. Flight way delayed due to a part needing replacement. Based on what the pilot indicated- the maintenance crew could’ve resolved this more efficiently than replacing whole part- and taken less time

We learned certain countries (a few) require a notarized letter from an ex to give permission for children to travel to those countries with the other spouse together with birth certificates. To find this out one hour before flying—not good. Nowhere is it documented by the airlines though they require it. Make sure about all documentation required.

The flight was delayed for over four hours due to “maintenance “. Your ground staff made no efforts to avoid my family missing their connecting flight to London. They did not try to reroute them and didn’t even offer meal vouchers without being asked. My daughter, her husband and four children were in the States for our son’s celebration of life service. They experienced rude and unhelpful staff in Asheville. The lack of communication was disgraceful. They missed their connecting flight and the first rebooking. Then the 2nd rebooked flight was delayed by over two hours. They didn’t leave Charlotte until 1:30 AM. Since returning home my granddaughters sleep has been so disrupted that they are overly tired and cry hysterically at bedtime. I have already contacted you regarding compensation but have yet to receive a response. All I’ve received is a canned wrote response. This is not acceptable!!! When my wife and I traveled to England in December on your partner, British Airlines, we were delayed for 4 and one half hours. We missed our connecting train to Leeds and had to pay double. They not only reimbursed our extra train expense, they also refunded half our airfare. And upon our return to the States we were surprised to find that they had upgraded us for free! Now that’s customer service!!! I look forward to a prompt real human response. Sincerely, Jon Cannon

Crew were attentive and friendly. Flight was smooth and early! I enjoyed the less crowded plane. Thank you!

No complaints. The flight was uneventful, which is a good thing.

Was as expected. Good leg room on planes - much appreciated.

after boarding on phx to sjd, crew discovered that one of the megaphones was either out of date or not working. It took 90 minutes to get a replacement and do the "paperwork." That is really unacceptable. Why wasn't the megaphone problem discovered before boarding? Is it part of normal maintenance check? who is responsible for checking. How can paperwork take that long? Fortunately, SJD was final destination for most travelers so very few if any passengers had to miss connections.

We sat on the plane for 1 hour because the airline was short handed could not be unloading.

I had trouble finding a boarding pass because I had an hour between Flights and American did not see my flight I believe because I was ticketed through KAYAK. I did not have enough time to go to the desk before boarding so I went to the desk and told them while I was boarding and they had a boarding pass for me within three minutes. Nice. I paid extra to have more legroom and it is definitely worth it for a six hour flight. I would’ve paid for a decent dinner, but they didn’t offer anything but a snack box —not good for six hours.

It was great. It was just a commuter so I splurged on first class and it was wonderful. Wish all seats were this spacious. Enjoyed it and will do it again.

Terrible flight seats where really uncomfortable I had body aches for 2 days and flight was delays almost two hours

It was super hot. The flight attendant seemed forgetful and abrupt.

Left Denver late, then sat on tarmac 30 min after arrival

The whole experience was bad. Didn't know no complimentary drinks or snacks. $4.39 for a soda is ridiculous even a bottle water. A carry on was $74 just crazy. I don't think I will take this airline ever again. Very bad

Everything was good, 20/30 minutes late waiting on a crew member. It’s hard to keep employees. Or serious employees I know. I remember one flight from Houston of Frontiers was almost 18 hours late. And another 4 hours late very poor. But I would rather be late and safe than the on the news. Thank you.

Bought seats on the flight and they were supposed to be 2 and a jumpseat. Plane clearly changed and it was a regular 3 seat row. Asked for a refund and was denied. If I wanted to sit next to someone else I wouldn't have bought the seats..

Lost baggage on my connecting flight. 24 hours later, still no update on my bags.

They didn’t bother to restock the plane before we left, so most items on the menu were not available.

It’s a cheap airline and I wish if they had better seats.

Seats are cramped and uncomfortable. You have to pay for everything and it is very expensive.

For a busy travel season, everything was clearly marked, correct, and smooth. My favorite travel description is “UNEVENTFUL,” and this trip met the mark!

The flight and crew were fine. When we (several groups) arrived in Norfolk on Sunday we discovered our bags had not arrived. The staff at norfolk airport was less than helpful. Told us our bags wouldn't arrive until Thursday. When asked what happened they said it bags never made it on the plane and it happened all the time. When asked about reimbursement for replacement items the desk agent said we could try to submit receipts online, but they weren't sure we would be reimbursed. I understand this is a low cost airline, but this was really beyond poor customer service.

Book cheap flights from Denver to Seattle

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Denver to Seattle found on KAYAK in the last 72 hours.
4/30Tue
nonstopFrontier
3h 10mDEN-SEA
$29
5/4Sat
nonstopFrontier
3h 11mDEN-SEA
$37
5/10Fri
nonstopFrontier
3h 09mDEN-SEA
$39
5/2Thu
nonstopDelta
3h 13mDEN-SEA
$69
5/14Tue
nonstopAlaska Airlines
2h 57mDEN-SEA
$70
6/9Sun
nonstopUnited Airlines
2h 57mDEN-SEA
$89
6/9Sun
nonstopAlaska Airlines
2h 57mDEN-SEA
$99
4/18Thu
nonstopDelta
3h 13mDEN-SEA
$129
4/16Tue
1 stopAmerican Airlines
9h 15mDEN-SEA
$131
5/4Sat
2 stopsUnited Airlines
16h 34mDEN-SEA
$228

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Last minute flights from Denver to Seattle

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Denver to Seattle that are departing in the next 10 days.
4/12Fri
nonstopFrontier
3h 09mDEN-SEA
4/28Sun
nonstopFrontier
2h 47mSEA-DEN
$127
4/12Fri
nonstopFrontier
3h 09mDEN-SEA
4/19Fri
nonstopFrontier
2h 50mSEA-DEN
$129
4/16Tue
nonstopDelta
3h 13mDEN-SEA
4/16Tue
nonstopDelta
2h 38mSEA-DEN
$297
4/16Tue
nonstopDelta
3h 13mDEN-SEA
4/16Tue
multi-stopDelta
4h 37mSEA-DEN
$321
4/12Fri
multi-stopAmerican Airlines
6h 09mDEN-SEA
4/14Sun
multi-stopAmerican Airlines
5h 26mSEA-DEN
$344
4/12Fri
multi-stopAmerican Airlines
6h 09mDEN-SEA
4/14Sun
multi-stopAmerican Airlines
5h 26mSEA-DEN
$391
4/14Sun
nonstopUnited Airlines
3h 01mDEN-SEA
4/14Sun
nonstopUnited Airlines
2h 49mSEA-DEN
$412
4/12Fri
multi-stopUnited Airlines
8h 22mDEN-SEA
4/14Sun
multi-stopUnited Airlines
8h 40mSEA-DEN
$436
4/13Sat
multi-stopAlaska Airlines
24h 01mDEN-SEA
4/14Sun
multi-stopAlaska Airlines
4h 14mSEA-DEN
$864
4/15Mon
multi-stopAlaska Airlines
13h 01mDEN-SEA
4/19Fri
multi-stopAlaska Airlines
6h 47mSEA-DEN
$919

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Denver - Seattle Flights

Departure:

Denver (DEN)United States

Destination:

Seattle (SEA)United States

Return flight deals:

Seattle - Denver

Cabin classes:

$268
$500
$322
$68