DEN - SEA

Find cheap flights from Denver to Seattle

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KAYAK searches 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, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Denver to Seattle, as well as popular online travel agencies
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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.

Recent round-trip flight deals from Denver to Seattle

KAYAK's recommended round-trip deals from the most popular airlines that fly from Denver to Seattle.
Discover the best prices for you by selecting your travel dates on KAYAK.
Choose your dates
Condor Logo
DEN-SEA
3h 00mdirect
Condor Logo
SEA-DEN
2h 43mdirect
Condor
Find Deal
Qatar Airways Logo
DEN-SEA
3h 01mdirect
Qatar Airways Logo
SEA-DEN
2h 40mdirect
Qatar Airways
Find Deal
Japan Airlines Logo
DEN-SEA
2h 59mdirect
Japan Airlines Logo
SEA-DEN
2h 44mdirect
Japan Airlines
Find Deal
Icelandair Logo
DEN-SEA
2h 58mdirect
Icelandair Logo
SEA-DEN
2h 44mdirect
Icelandair
Find Deal
Air France Logo
DEN-SEA
2h 59mdirect
Air France Logo
SEA-DEN
2h 52mdirect
Air France
Find Deal
Delta Logo
DEN-SEA
3h 01mdirect
Delta Logo
SEA-DEN
2h 50mdirect
Copa Airlines Logo
DEN-SEA
2h 58mdirect
Copa Airlines Logo
SEA-DEN
2h 51mdirect
Copa Airlines
Find Deal
SWISS Logo
DEN-SEA
3h 02mdirect
SWISS Logo
SEA-DEN
2h 46mdirect
United Airlines Logo
DEN-SEA
3h 01mdirect
United Airlines Logo
SEA-DEN
2h 43mdirect
United Airlines
Find Deal
STARLUX Airlines Logo
DEN-SEA
2h 56mdirect
STARLUX Airlines Logo
SEA-DEN
2h 44mdirect
STARLUX Airlines
Find Deal
Alaska Airlines Logo
DEN-SEA
2h 59mdirect
Alaska Airlines Logo
SEA-DEN
2h 44mdirect
Alaska Airlines
Find Deal
Frontier Logo
DEN-SEA
3h 06mdirect
Frontier Logo
SEA-DEN
2h 46mdirect
Frontier
Find Deal
Southwest Logo
DEN-SEA
2h 55mdirect
Southwest Logo
SEA-DEN
2h 40mdirect
Southwest
Find Deal
Finnair Logo
DEN-SEA
2h 56mdirect
Finnair Logo
SEA-DEN
2h 43mdirect
Finnair
Find Deal
Scandinavian Airlines Logo
DEN-SEA
3h 11mdirect
Scandinavian Airlines Logo
SEA-DEN
2h 47mdirect
Scandinavian Airlines
Find Deal
Hawaiian Airlines Logo
DEN-SEA
2h 59mdirect
Hawaiian Airlines Logo
SEA-DEN
2h 44mdirect
Hawaiian Airlines
Find Deal
Korean Air Logo
DEN-SEA
2h 59mdirect
Korean Air Logo
SEA-DEN
2h 41mdirect
Korean Air
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ANA Logo
DEN-SEA
3h 01mdirect
ANA Logo
SEA-DEN
2h 51mdirect
Air Tahiti Nui Logo
DEN-SEA
3h 01mdirect
Air Tahiti Nui Logo
SEA-DEN
2h 44mdirect
Air Tahiti Nui
Find Deal
WestJet Logo
DEN-SEA
3h 01mdirect
WestJet Logo
SEA-DEN
2h 45mdirect
WestJet
Find Deal
Virgin Atlantic Logo
DEN-SEA
3h 01mdirect
Virgin Atlantic Logo
SEA-DEN
2h 47mdirect
Virgin Atlantic
Find Deal
Singapore Airlines Logo
DEN-SEA
2h 59mdirect
Singapore Airlines Logo
SEA-DEN
2h 44mdirect
Singapore Airlines
Find Deal

Expert advice for your flight from Denver to Seattle

 
Snippets provided in this section are AI-generated based on a summarization of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are specific to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airlines
Alaska Airlines

Alaska's Wine Flies Free program allows free wine case check-in for Mileage Plan members.


Alaska Airlines' 20-minute bag guarantee offers bonus miles if bags delay beyond 20 minutes.

Delta

Delta's Comfort Plus offers up to 8 cm extra legroom, ideal for added comfort on domestic flights.


Delta offers free Wi-Fi for SkyMiles members on domestic flights, enhancing connectivity during travel.

Read more about Deltaby Stefanie Waldek
United Airlines

United's Economy Plus offers up to 15 cm more legroom, enhancing comfort on domestic flights.


United's Priority Boarding ensures overhead bin space, ideal for carry-on travelers.

Frontier

Frontier's Premium Bundle offers priority boarding and extra legroom for just CA$27 more than Economy.


Avoid Basic Fare to prevent middle seats; Economy Bundle offers free seat selection and carry-on.

Read more about Frontierby Stefanie Waldek
Our travel experts
Harriet Baskas

Harriet Baskas

Expert on Alaska Airlines

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
Stefanie Waldek

Stefanie Waldek

Expert on Delta, United Airlines and Frontier

Stefanie Waldek

Stefanie Waldek

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Read more

KAYAK's insights & trends for Denver to Seattle flights

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 round-trip flights from Denver to Seattle clicked on KAYAK for each day over the last 12 months.
For Denver to Seattle, Saturday is the cheapest day to fly on average and Tuesday is the most expensive. Flying from Seattle back to Denver, the best deals are generally found on Monday, with Sunday being the most expensive.

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 round-trip 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 October, where tickets cost C$ 227 (return) on average. On the other hand, the most expensive months are July and March, where the average cost of round-trip tickets is C$ 308 and C$ 300 respectively.

Can I save money by flying with a layover from Denver to Seattle?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.
No, with an average price for the route of C$ 962, prices are generally cheapest when you fly direct.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip 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 week.
To get a below average price on the flight from Denver to Seattle, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 4 weeks before departure.

Good to know

Low season

January

High season

July
Best time to beat the crowds (6% less expensive on average)
Most popular time to fly (13% more expensive on average)

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.

Flights from Denver to Seattle: the best tips from KAYAK users' own experiences

Insights shared by verified travellers who flew the route from Denver to Seattle 
Verified travelerFlew with Alaska AirlinesDEN-SEAOct 2024
Go early, it’s a big airport. There are two TSA screening areas, one might be more crowded than the other. From checking it to the gate give yourself at least 20-30 minutes to get there.
Verified travelerFlew with Alaska AirlinesDEN-SEAFeb 2024
Fly with Alaska and you’ll be pleased at their friendly competence.

FAQs for booking flights from Denver to Seattle

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

    All the following airlines offer inflight Wi-Fi service on the Denver to Seattle flight route: Alaska Airlines, Hawaiian Airlines, Delta, Lufthansa, Air Canada, and United Airlines.

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

    The Boeing 737-800 Passenger/BBJ2 (winglets) is the aircraft model that flies most regularly on the Denver to Seattle flight route.

  • Which airline alliances offer flights from Denver to Seattle?

    SkyTeam, oneworld, 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 direct flights from Denver to Seattle on a daily basis.

  • 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.

  • 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

KAYAK’s top tips for finding a cheap flight from Denver to Seattle

  • Looking for a cheap flight? 25% of our users found flights on this route for C$ 560 or less round-trip.

Prefer to fly direct from Denver to Seattle?

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

Direct departures

Denver Intl to Seattle/Tacoma Intl

Monday

ANA,Air France,Air Tahiti Nui, +18 more

ANA,Air France, +19 more

Tuesday

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

ANA,Air France, +16 more

Wednesday

ANA,Air France,Air Tahiti Nui, +18 more

ANA,Air France, +19 more

Thursday

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

ANA,Air France, +18 more

Friday

ANA,Air France,Air Tahiti Nui, +18 more

ANA,Air France, +19 more

Saturday

ANA,Air France,Air Tahiti Nui, +18 more

ANA,Air France, +19 more

Sunday

ANA,Air France,Air Tahiti Nui, +19 more

ANA,Air France, +20 more

See more nonstop flights

Direct returns

Seattle/Tacoma Intl to Denver Intl

Monday

ANA,Air Tahiti Nui,Alaska Airlines, +19 more

ANA,Air Tahiti Nui, +20 more

Tuesday

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

ANA,Air France, +17 more

Wednesday

ANA,Air France,Air Tahiti Nui, +19 more

ANA,Air France, +20 more

Thursday

ANA,Air France,Air Tahiti Nui, +18 more

ANA,Air France, +19 more

Friday

ANA,Air Tahiti Nui,Alaska Airlines, +19 more

ANA,Air Tahiti Nui, +20 more

Saturday

ANA,Air France,Air Tahiti Nui, +19 more

ANA,Air France, +20 more

Sunday

ANA,Air France,Air Tahiti Nui, +20 more

ANA,Air France, +21 more

See more nonstop flights
See more nonstop flights

Top airline flying 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.
5.9
FrontierOverall score based on 3283 reviews
4.8Food
5.6Comfort
4.6Entertainment
6.8Crew
6.2Boarding
Airline reviews

Everything went as planned. Crew was great. Seats were still not that comfortable.

8.0 ExcellentMatthew, Mar 2025DEN - SNA
Read more Frontier reviews

Everything went as planned. Crew was great. Seats were still not that comfortable.

they delayed my flight which ended up, causing my layover flight to leave without me, resulting in me missing a flight and having to stay overnight in Houston international. I got no compensation other than a flight to my original location only a day later. i’ve never experienced such a unprofessional situation

The seats were extremely hard and uncomfortable, even for a budget airline.

Boarding was very well executed. Got my bag right away.

Overall experience good. There was no food and seats were not terribly comfortable.

There was nothing to like, flight delayed had to move to different departure areas, disorganized to say the leasr

There were a lot of issues every step of the process. Check in, security, boarding, and dealing with luggage. Plus the money you think you are saving you end up using in hidden fees.

The flight attendant was arguing with a passenger before takeoff. The passenger was frustrated but the flight attendant should have handled it with grace, but instead she was nasty and rude. The seats were comfortable and the flight was uneventful. I wish we didn’t have to pay for drinks or snacks but that’s what you get with a budget airline.

Booked two aisle seats and were switched to an aisle and middle. Not happy.

I fly Frontier often and generally don't have any issues. For some reason, the Denver to Houston's George Bush Intercontinental (IAH) flight always needs to wait on the tarmac in Houston because a gate is not available after landing. I've been stuck for as little as 15 minutes and as much as a little over an hour. I know only fly the Frontier Denver to IAH route when there is not an available flight to Houston Hobby (HOU).

Everything you need to know for your flight from Denver to Seattle

Information on your arrival and departure airports

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