DEN - SEA

£74 Find Cheap Flights from Denver to Seattle

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 21/5. 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

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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41,299,237 searches in the past 7 days on KAYAK

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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 return 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 return flight deals from Denver to Seattle

KAYAK's recommended return flight 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
Hawaiian Airlines Logo
12:56 - 14:55DEN-SEA
2h 59mdirect
Hawaiian Airlines Logo
20:23 - 00:05SEA-DEN
2h 42mdirect
£144Hawaiian Airlines
Find Deal
Sat, 17 May - Sat, 17 May
Frontier Logo
22:29 - 00:34DEN-SEA
3h 05mdirect
Frontier Logo
19:48 - 23:41SEA-DEN
2h 53mdirect
£144Frontier
Find Deal
Sun, 8 Jun - Sun, 15 Jun
Delta Logo
06:30 - 08:29DEN-SEA
2h 59mdirect
Delta Logo
18:00 - 21:44SEA-DEN
2h 44mdirect
£148Delta
Find Deal
Tue, 10 Jun - Tue, 10 Jun
Alaska Airlines Logo
06:00 - 07:59DEN-SEA
2h 59mdirect
Alaska Airlines Logo
11:20 - 18:09SEA-DEN
5h 49m1 stop
£151Alaska Airlines
Find Deal
Sat, 17 May - Sat, 17 May
Delta Logo
19:50 - 21:56DEN-SEA
3h 06mdirect
Delta Logo
18:00 - 21:41SEA-DEN
2h 41mdirect
£156Delta
Find Deal
Sat, 9 Aug - Thu, 21 Aug
Alaska Airlines Logo
11:40 - 16:56DEN-SEA
6h 16m1 stop
Alaska Airlines Logo
20:23 - 00:05SEA-DEN
2h 42mdirect
£159Alaska Airlines
Find Deal
Wed, 28 May - Wed, 28 May
United Airlines Logo
21:00 - 22:59DEN-SEA
2h 59mdirect
United Airlines Logo
13:00 - 20:08SEA-DEN
6h 08m1 stop
£170United Airlines
Find Deal
Fri, 29 Aug - Sat, 30 Aug
Southwest Logo
19:30 - 00:30DEN-SEA
6h 00m1 stop
Southwest Logo
14:45 - 21:00SEA-DEN
5h 15m1 stop
£177Southwest
Find Deal
Tue, 24 Jun - Wed, 2 Jul
Southwest Logo
07:45 - 14:10DEN-SEA
7h 25m1 stop
Southwest Logo
09:55 - 18:00SEA-DEN
7h 05m1 stop
£177Southwest
Find Deal
Mon, 11 Aug - Wed, 20 Aug
United Airlines Logo
07:45 - 15:58DEN-SEA
9h 13m1 stop
United Airlines Logo
07:00 - 14:59SEA-DEN
6h 59m1 stop
£219United Airlines
Find Deal
Sun, 11 May - Wed, 21 May

Expert advice for your flight from Denver to Seattle

 
Snippets provided in this section are AI-generated based on a summarisation 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.

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
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.

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, 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 Frontier, Delta and United Airlines

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 out at 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.
If you are looking for a flight deal from Denver to Seattle, look for departures on Saturdays and avoid leaving on a Tuesday, as it's usually the priciest day. When flying back from Seattle, Thursday is the cheapest day to fly and Saturday is 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 £123 (return) on average. On the other hand, the most expensive months are July and March, where the average cost of round-trip tickets is £168 and £163 respectively.

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

The average return price for all direct flights, flights with one stopover, and flights with two stopovers for the route found by users searching on KAYAK in the last 2 weeks.
No, with an average price for the route of £138, 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 - Cheap tickets from Denver to Seattle

Low season

January

High season

July

Cheapest flight

£74
Best time to beat the crowds (6% less expensive on average)
Most popular time to fly (13% more expensive on average)
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 return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns 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

  • 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 £99 for a one-way ticket and £191 for a return.

  • 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 return 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 from Seattle to Denver? 25% of our users found flights on this route for £133 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 direct 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 Tahiti Nui, Alaska Airlines, +19 more

ANA, Air Tahiti Nui, +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 direct flights
See more direct flights

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

Information on your arrival and departure airports

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