Cheap flights from Washington Dulles Intl Airport to Seattle

Round-trip
1 adult
Economy
From?
To?
Sun 10/24
Sun 10/31

Travel Restriction Alert

The COVID-19 (coronavirus) outbreak may impact travel from Washington Dulles Intl to Seattle.
View current United States travel restrictions

Flight information for Washington Dulles Intl Airport to Seattle
(IAD to SEA)

Find info about flight duration, direct flights, and airports for your flight from Washington Dulles Intl Airport to Seattle
Best Price Found$234The best flight deal from Washington Dulles Intl Airport to Seattle found on momondo in the last 72 hours is $234
Fastest flight time5h 58mThe fastest flight from Washington Dulles Intl Airport to Seattle takes 5h 58m
Direct flightsThu, Fri, Sat and SunDirect flights go from Washington Dulles Intl Airport to Seattle on Thursday, Friday, Saturday and Sunday. The only airline offering direct flights is Alaska Airlines.
Airports in Seattle3 airportsThere are 3 airports near Seattle: Seattle King County/Boeing (BFI), Seattle Lake Union Spb (LKE), Seattle/Tacoma Intl (SEA)

How to get the cheapest flight ticket from Washington Dulles Intl Airport to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly from Washington Dulles Intl Airport to Seattle?

February

The cheapest time of year to fly to Seattle from Washington Dulles Intl Airport is February. Most expensive is December

What is the cheapest airline that flies to Seattle from Washington Dulles Intl Airport?

Frontier

Alaska Airlines, Delta, and Frontier are the most popular carriers operating from Washington Dulles Intl Airport to Seattle

How far in advance should you book Washington Dulles Intl Airport to Seattle flights?

29 days before

The cheapest time to buy a flight from Washington Dulles Intl Airport to Seattle is approximately 29 days to departure


Easily compare round-trip flights from Washington Dulles Intl Airport to Seattle

Below you can see the best fares for your round-trip flight route over the next three months. All fares were found on momondo this week. Browse the quickest and cheapest flights from Washington Dulles Intl Airport to Seattle by changing tabs
Multiple Airlines
Nov 2
IAD3:42 amWashington Dulles Intl
5h 58m
SEA9:40 amSeattle/Tacoma Intl
Nov 3
SEA1:10 pmSeattle/Tacoma Intl
14h 20m
2 stops
IAD3:30 amWashington Dulles Intl
Alaska Airlines
Nov 5
IAD3:00 amWashington Dulles Intl
5h 55m
SEA8:55 amSeattle/Tacoma Intl
Nov 8
SEA4:00 amSeattle/Tacoma Intl
5h 13m
IAD9:13 amWashington Dulles Intl
Delta
Dec 2
IAD8:30 amWashington Dulles Intl
7h 47m
1 stop
SEA4:17 pmSeattle/Tacoma Intl
Dec 6
SEA4:55 amSeattle/Tacoma Intl
4h 57m
IAD9:52 amWashington Dulles Intl
United Airlines
Dec 2
IAD3:35 amWashington Dulles Intl
9h 41m
1 stop
SEA1:16 pmSeattle/Tacoma Intl
Dec 4
SEA12:00 amSeattle/Tacoma Intl
8h 25m
1 stop
IAD8:25 amWashington Dulles Intl
American Airlines
Nov 3
IAD11:21 amWashington Dulles Intl
8h 40m
1 stop
SEA8:01 pmSeattle/Tacoma Intl
Nov 9
SEA5:00 pmSeattle/Tacoma Intl
9h 29m
1 stop
IAD2:29 amWashington Dulles Intl
Multiple Airlines
Oct 31
IAD3:42 amWashington Dulles Intl
5h 58m
SEA9:40 amSeattle/Tacoma Intl
Nov 3
SEA1:10 pmSeattle/Tacoma Intl
14h 20m
2 stops
IAD3:30 amWashington Dulles Intl

Find the cheapest one-way flights from Washington Dulles Intl Airport to Seattle

If you're looking for one-way flights from Washington Dulles Intl Airport to Seattle, view some of our deals below provided by Alaska Airlines and United Airlines
Multiple Airlines
Nov 4
IAD7:15 amWashington Dulles Intl
27h 24m
2 stops
SEA10:39 amSeattle/Tacoma Intl
Alaska Airlines
Nov 22
IAD2:05 pmWashington Dulles Intl
5h 55m
SEA8:00 pmSeattle/Tacoma Intl
United Airlines
Dec 1
IAD7:40 amWashington Dulles Intl
9h 08m
1 stop
SEA4:48 pmSeattle/Tacoma Intl

Search last-minute flights to Seattle from Washington Dulles Intl Airport

Find and compare flight prices for your last-minute flight from Washington Dulles Intl Airport to Seattle
United Airlines
Oct 26
IAD4:45 amWashington Dulles Intl
16h 29m
2 stops
SEA9:14 pmSeattle/Tacoma Intl
Nov 2
SEA9:25 amSeattle/Tacoma Intl
4h 50m
IAD2:15 pmWashington Dulles Intl
Multiple Airlines
Oct 26
IAD6:10 pmWashington Dulles Intl
20h 18m
2 stops
SEA2:28 pmSeattle/Tacoma Intl
Nov 2
SEA6:00 pmSeattle/Tacoma Intl
9h 29m
1 stop
IAD3:29 amWashington Dulles Intl
Delta
Oct 27
IAD2:30 amWashington Dulles Intl
5h 57m
SEA8:27 amSeattle/Tacoma Intl
Nov 2
SEA7:40 amSeattle/Tacoma Intl
5h 00m
IAD12:40 pmWashington Dulles Intl
American Airlines
Oct 25
IAD1:23 pmWashington Dulles Intl
9h 09m
1 stop
SEA10:32 pmSeattle/Tacoma Intl
Nov 6
SEA3:20 amSeattle/Tacoma Intl
9h 10m
1 stop
IAD12:30 pmWashington Dulles Intl
United Airlines
Oct 26
IAD4:45 amWashington Dulles Intl
16h 29m
2 stops
SEA9:14 pmSeattle/Tacoma Intl
Nov 2
SEA7:00 amSeattle/Tacoma Intl
7h 06m
1 stop
IAD2:06 pmWashington Dulles Intl
United Airlines
Oct 26
IAD4:45 amWashington Dulles Intl
16h 29m
2 stops
SEA9:14 pmSeattle/Tacoma Intl
Oct 31
SEA9:25 amSeattle/Tacoma Intl
4h 50m
IAD2:15 pmWashington Dulles Intl

Best airlines flying from Washington Dulles Intl Airport to Seattle

Compare and see reviews for airlines that fly from Washington Dulles Intl Airport to Seattle with momondo
AirlineRatingFree CancellationPrice
Delta
PriceFrom $123
Free Cancellation
Rating
8.2
8.2

Boarding

8.4

Comfort

8.3

Crew

8.1

Entertainment

8.0

Food

Reviews

Great

1 / 10
Alaska Airlines
PriceFrom $126
Free Cancellation
Rating
8.3
8.7

Boarding

8.4

Comfort

8.7

Crew

7.8

Entertainment

7.4

Food

Reviews

Great plane , great crew , on time , The snack was a negative. Especially for the time of night . Dinner and gave me toddler peanuts :(!!

1 / 10
Frontier
PriceFrom $134
Free Cancellation
Rating
6.3
6.6

Boarding

6.0

Comfort

7.1

Crew

4.8

Entertainment

5.1

Food

Reviews

No WiFi. Overpriced snacks. Just charge more upfront and give more.

1 / 10
Spirit Airlines
PriceFrom $137
Free Cancellation
Rating
6.4
6.5

Boarding

6.0

Comfort

6.9

Crew

4.9

Entertainment

5.2

Food

Reviews

Overpricing luggage and delayed flights

1 / 10
American Airlines
PriceFrom $138
Free Cancellation
Rating
7.2
7.4

Boarding

7.1

Comfort

7.8

Crew

7.1

Entertainment

6.8

Food

Reviews

Flight attendant for first class is definitely not a morning person. Oh and the WiFi DID NOT WORK!

1 / 10
Sun Country Air
PriceFrom $151
Free Cancellation
Rating
7.8
8.0

Boarding

7.6

Comfort

8.5

Crew

7.0

Entertainment

6.9

Food

Reviews

Price was great. Paying for selecting seats and overhead storage was not nice. Nice new plane. On time flights in both directions.

1 / 9
United Airlines
PriceFrom $158
Free Cancellation
Rating
6.9
7.3

Boarding

6.7

Comfort

7.5

Crew

6.7

Entertainment

6.2

Food

Reviews

Pros: Everything! From ticketing agent to all the crew on our flight back were awesome. Thank you!

1 / 10

  • Are airlines flying from Washington Dulles Intl to Seattle/Tacoma Intl offering flexible cancellation due to COVID-19?

    Some of our partner airlines flying from Washington Dulles Intl to Seattle/Tacoma Intl are adopting new policies due to the global impact of COVID-19. Some of the airlines that may be waiving their cancellation fees are United Airlines, Alaska Airlines, and Delta. You can search for the full list of airlines like United Airlines that are offering this flexibility.

  • How far is Washington Dulles Intl to Seattle/Tacoma Intl by plane?

    The distance between Washington Dulles Intl and Seattle/Tacoma Intl is about 2299.7 mi. A reasonable flight in good conditions will take 5h 55m.


Can I fly to Seattle/Tacoma Intl from Washington Dulles Intl right now?

Information is based on travel restrictions for travel to Seattle/Tacoma Intl within the United States

Most visitors from Washington Dulles Intl need to provide a negative COVID-19 test result and/or quarantine to enter Seattle/Tacoma Intl.

COVID-19 testing requirements
Visitors from Washington Dulles Intl must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to Seattle/Tacoma Intl.

Quarantine requirements
Visitors from Washington Dulles Intl are not required to quarantine after entering Seattle/Tacoma Intl.

Can I fly back to Washington Dulles Intl from Seattle/Tacoma Intl?

Returning to Washington Dulles Intl from Seattle/Tacoma Intl

COVID-19 testing requirements
Visitors from Seattle/Tacoma Intl must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to Washington Dulles Intl.

Quarantine requirements
Visitors from Seattle/Tacoma Intl are not required to quarantine after entering Washington Dulles Intl.

If you are planning to travel to Seattle at this time, it is recommended that you stay up to date on current restrictions and follow proper safety measures while in public.

Alternative routes for Washington Dulles Intl Airport to Seattle

Compare alternative flights to and from nearby airports and cities to discover the best prices and most convenient flight times
Washington to Seattle Flights
Fastest flight time5h 55m
Cheapest price$108
Washington to Spokane Flights
Fastest flight time8h 14m
Cheapest price$266

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