IAD - SEA

£102 Find Cheap Flights from Washington, D.C. to Seattle

1 adult
1 adult, Economy

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 Washington, D.C. 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 Washington, D.C. to Seattle, as well as popular online travel agencies
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Expert advice
Useful Info
Expert advice

Expert advice for your flight from Washington, D.C. 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 original 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 Premium Class offers priority boarding and complimentary drinks on flights over 350 miles.


Alaska's 20-minute baggage guarantee offers a discount or miles if bags are late.

Delta

Delta's Comfort Plus seats offer up to 3 inches extra legroom compared to Main Cabin.


Free Wi-Fi for SkyMiles members on domestic flights; sign up onboard if needed.

Read more about Deltaby Stefanie Waldek
United Airlines

United's Economy Plus offers up to 6 inches more legroom than standard economy seats.


Purchase Priority Boarding to ensure overhead bin space, placing you in Zone 2.

Airports
IAD

For a smooth departure from IAD, use the AeroTrain for quick access between terminals and check an airport map before arrival.

Read more about IADby Stefanie Waldek
SEA

To reach Seattle from SEA, take the Link light rail for a 40-minute ride, avoiding costly ride-hailing surcharges.

Read more about SEAby Harriet Baskas
Our travel experts
Harriet Baskas

Harriet Baskas

Expert on Alaska Airlines and SEA

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 Delta, United Airlines and IAD

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
Useful Info

Good to know - Cheap tickets from Washington, D.C. to Seattle

Low seasonFebruary
Cheapest flight£102
Best time to beat the crowds (17% less expensive on average)
Most popular time to fly (11% more expensive on average)
Flight from Washington, D.C. to Seattle

When to book flights from Washington, D.C. to Seattle

Are your dates flexible? Find out the best times to travel from Washington, D.C. 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 Washington, D.C. to Seattle: the best tips from KAYAK users' own experiences

Insights shared by verified travellers who flew the route from Washington, D.C. to Seattle 
Verified travelerFlew with Alaska AirlinesIAD-SEASept 2024
Pay the money if can afford to upgrade your seats
Verified travelerFlew with Alaska AirlinesIAD-SEAJul 2024
Dulles, like Seattle has a tram. That can be surprising. The TSA at Seattle is notoriously LONG, however, both times in the last year that I have flown, that has not been the case. At Dulles, the TSA lines were efficient as well. The airport interior is well marked for getting around. I did note that the garbages were full in the Southwest and Alaska areas- as we were there 6 hours and had lots of time to notice nit-picky things that nobody else would care about :). It was convenient to have a "charging station" nearby the Alaska waiting area (right across from our gate). It had 3 ports, and I noticed that as soon as I unplugged mine, it was jumped right on. Suggestion- have Dulles add a few more for passengers who need to recharge phones. Great experience, thank you.
Verified travelerFlew with Alaska AirlinesIAD-SEAMay 2024
Get to the airport early, especially on holidays
  • How can I get from the Sea-Tac Airport (SEA) to my hotel in downtown Seattle?

    There are a few options to get you from the airport to your hotel in downtown Seattle. One option is the subway system that picks up passengers on the 4th floor of the parking garage. There are a couple of bus services at the Sea-Tac Airport. King County Metro travels to various parts of the city of Seattle while Sound Transit takes passengers to the outlining cities of Bellevue and Renton. The buses pick up by the subway station.

  • Where can I park my car long-term at the Washington Dulles Airport?

    Very close to the terminal, there is a parking garage and a terminal parking lot. There is also an economy lot a little further away. A shuttle service will take you from the economy lot to the main terminal of the airport.

  • What restaurants are at the Washington Dulles Airport?

    There are a couple of bars, a pizzeria, and a burger place where you can dine. Some well-known restaurants in this airport include Auntie Anne's, Carrabba's Italian Grill, Chick-Fil-A, and Jersey Mike's Subs.

  • What lounges are at these two airports?

    Both airports have lounges where you can enjoy some quiet time. These lounges also offer complimentary drinks and snacks. They are sponsored by airlines, credit card companies, or the airport. At the Washington Dulles Airport, there is a United Airlines, British Airways, and an Air France lounge. The Sea-Tac Airport has lounges affiliated with United Airlines, American Express, Delta Airlines, and Alaska Airlines.

KAYAK’s top tips for finding a cheap flight from Washington, D.C. Dulles Intl Airport to Seattle

  • Looking for a cheap flight from Seattle to Washington, D.C.? 25% of our users found flights on this route for £196 or less one-way.
  • You can book a nonstop flight from Washington Dulles Airport (IAD) to the Seattle-Tacoma International Airport (SEA). However, there are some flight routes that will require you to switch planes in either Salt Lake City, Dallas-Fort Worth, or San Francisco.
  • The Washington Dulles International Airport (IAD) has a simple layout. It has one main terminal that connects to four concourses from which departure and arrival flights are managed. To assist passengers with getting around, the airport is equipped with moving walkways, escalators, and elevators. It also has a people mover system that is known as the AeroTrain, it goes from one side of the airport to another.
  • The SEA underground makes it easy to get around the Seattle-Tacoma International Airport (SEA). This is a people mover system or tram that goes around the airport including the main terminal, the north terminal, the south terminal, and the four concourses.
  • There is lots to do and see at the Seattle-Tacoma International Airport. You can explore African culture in the Africa Lounge. Here you can enjoy African-inspired drinks and food. Throughout the year, the airport hosts live musical concerts. These concerts take place in the central terminal, in front of Sub Pop Records, and close to the children's play area.
  • Numerous rental car agencies have offices at the Sea-Tac Airport. This includes Budget, Dollar, Hertz, and Thrifty just to name a few. The rental car center is located offsite. However, there is a shuttle bus that will take you from the airport to the car rental lot.

Prefer to fly direct from Washington, D.C. to Seattle?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Washington, D.C. Dulles Intl to Seattle/Tacoma Intl.
Find which airlines fly direct from Washington, D.C. Dulles Intl Airport to Seattle/Tacoma Intl Airport, which days they fly and book direct flights.

Direct departures

Washington, D.C. Dulles Intl to Seattle/Tacoma Intl

Monday

Air Tahiti Nui, Alaska Airlines, American Airlines, +15 more

Air Tahiti Nui, Alaska Airlines, +16 more

Tuesday

Air Tahiti Nui, Alaska Airlines, American Airlines, +14 more

Air Tahiti Nui, Alaska Airlines, +15 more

Wednesday

Air Tahiti Nui, Alaska Airlines, American Airlines, +15 more

Air Tahiti Nui, Alaska Airlines, +16 more

Thursday

Air Tahiti Nui, Alaska Airlines, American Airlines, +15 more

Air Tahiti Nui, Alaska Airlines, +16 more

Friday

Air Tahiti Nui, Alaska Airlines, American Airlines, +14 more

Air Tahiti Nui, Alaska Airlines, +15 more

Saturday

Air Tahiti Nui, Alaska Airlines, American Airlines, +15 more

Air Tahiti Nui, Alaska Airlines, +16 more

Sunday

Air Tahiti Nui, Alaska Airlines, American Airlines, +15 more

Air Tahiti Nui, Alaska Airlines, +16 more

See more direct flights

Direct returns

Seattle/Tacoma Intl to Washington, D.C. Dulles Intl

Monday

ANA, Air Tahiti Nui, Alaska Airlines, +14 more

ANA, Air Tahiti Nui, +15 more

Tuesday

ANA, Air Tahiti Nui, Alaska Airlines, +15 more

ANA, Air Tahiti Nui, +16 more

Wednesday

ANA, Air Tahiti Nui, Alaska Airlines, +14 more

ANA, Air Tahiti Nui, +15 more

Thursday

ANA, Air Tahiti Nui, Alaska Airlines, +15 more

ANA, Air Tahiti Nui, +16 more

Friday

ANA, Air Tahiti Nui, Alaska Airlines, +15 more

ANA, Air Tahiti Nui, +16 more

Saturday

ANA, Air Tahiti Nui, Alaska Airlines, +15 more

ANA, Air Tahiti Nui, +16 more

Sunday

ANA, Air Tahiti Nui, Alaska Airlines, +15 more

ANA, Air Tahiti Nui, +16 more

See more direct flights

Everything you need to know for your flight from Washington, D.C. to Seattle

Information on your arrival and departure airports

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