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Dulles International Airport to Seattle-Tacoma International Airport flight
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Cheap Flight Deals from Dulles International Airport to Seattle-Tacoma International Airport

Search for flights from Washington D.C. to Seattle and check out affordable one-way and round-trip options.

  • One way
  • Round-trip
sortSort: Price (Lowest)
  • Sort: Price (Lowest)
  • Sort: Departure (Earliest)
      • IAD07:10
        10h 17m
        1 stop
        SEA14:27
        Washington D.C. - Seattle|Tue, Apr 30|Alaska Airlines
        CAD 175CAD 245
        28% OFF
        28% OFF
        CAD 245CAD 175
      • IAD17:45
        5h 53m
        Direct
        SEA20:38
        Washington D.C. - Seattle|Tue, Apr 30|Delta Air Lines
        CAD 178CAD 245
        27% OFF
        27% OFF
        CAD 245CAD 178
      • IAD07:40
        5h 40m
        Direct
        SEA10:20
        Washington D.C. - Seattle|Tue, May 7|Alaska Airlines
        CAD 179CAD 245
        27% OFF
        27% OFF
        CAD 245CAD 179
      • IAD07:30
        5h 50m
        Direct
        SEA10:20
        Washington D.C. - Seattle|Sat, May 4|Delta Air Lines
        CAD 179
        CAD 179
      • IAD18:05
        22h 20m
        1 stop
        SEA13:25
        Washington D.C. - Seattle|Sat, May 18|Alaska Airlines
        CAD 183
        CAD 183
      • IAD19:09
        5h 51m
        Direct
        SEA22:00
        Washington D.C. - Seattle|Wed, May 8|Alaska Airlines
        CAD 185
        CAD 185
      • IAD07:00
        5h 30m
        Direct
        SEA09:30
        Washington D.C. - Seattle|Tue, Jun 4|Alaska Airlines
        CAD 186
        CAD 186
      • IAD19:09
        5h 51m
        Direct
        SEA22:00
        Washington D.C. - Seattle|Mon, Apr 29|Alaska Airlines
        CAD 186
        CAD 186
      • IAD07:00
        5h 30m
        Direct
        SEA09:30
        Washington D.C. - Seattle|Wed, Jun 5|Alaska Airlines
        CAD 188
        CAD 188
      • IAD07:00
        5h 30m
        Direct
        SEA09:30
        Washington D.C. - Seattle|Sun, May 26|Alaska Airlines
        CAD 188
        CAD 188
      • IAD13:00
        3h 5m
        Direct
        SEA14:00
        Washington D.C. - Seattle|Mon, May 6|Alaska Airlines
        Find More Flights
        Find More Flights

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Selected Airlines from Dulles International Airport to Seattle-Tacoma International Airport

See which airlines fly from Washington D.C. to Seattle. Find the airline that best meets your travel needs by comparing prices and treat yourself to an enjoyable journey.

Delta Air Lines
From CAD 178
United Airlines
From CAD 207
Southwest Airlines
From CAD 209
Sun Country Airlines
From CAD 216
Southern Airways Express
From CAD 241
Alaska Airlines
From CAD 312
American Airlines
From CAD 570
ANA airlines
Find more flights and airlines

Find Cheaper Flights from Washington D.C. to Seattle

Explore other flights from Washington D.C. to Seattle to find the best alternative options.

  • Cheapest
    Frontier Airlines
    DCA
    07:00
    28h 55m
    2 transfer
    SEA
    08:55
    Ronald Reagan Washington National Airport - Seattle-Tacoma International Airport
    Tue, Apr 30Frontier Airlines
    CAD 99
  • Frontier Airlines
    DCA
    07:00
    28h 55m
    2 transfer
    SEA
    08:55
    Ronald Reagan Washington National Airport - Seattle-Tacoma International Airport
    Tue, Apr 30Frontier Airlines
    CAD 99
    Find More Flights
Flight Schedule from Dulles International Airport to Seattle-Tacoma International Airport

Check the schedule for flights from Washington D.C. to Seattle and find the flight that best matches your travel plans.

Flight info.
Departure
Arrival
Weekly Schedule

  1. AA5458

    American Airlines

    05:02

    IAD

    1.5h

    06:34

    CLT

    S------
    Search

  2. AA2775

    American Airlines

    09:27

    CLT

    5.9h

    12:23

    SEA

    SMTWTFS

  3. AS499

    Alaska Airlines

    07:02

    IAD

    5.7h

    Direct

    09:44

    SEA

    SMTWTFS
    Search

  4. DL748

    Delta Air Lines

    07:30

    IAD

    5.8h

    Direct

    10:20

    SEA

    SMTWTF-
    Search

  5. SY224

    Sun Country Airlines

    13:53

    IAD

    2.9h

    15:44

    MSP

    S--W--S
    Search

  6. SY285

    Sun Country Airlines

    15:54

    MSP

    3.9h

    17:46

    SEA

    S-TWT-S

  7. AS507

    Alaska Airlines

    16:16

    IAD

    5.3h

    18:34

    SAN

    SMTWTFS
    Search

  8. AS1071

    Alaska Airlines

    18:49

    SAN

    2.9h

    21:44

    SEA

    S--WT-S

  9. AA5447

    American Airlines

    17:38

    IAD

    2.1h

    19:45

    CLT

    SMTWTFS
    Search

  10. AA2029

    American Airlines

    19:24

    CLT

    5.5h

    21:56

    SEA

    S------

  11. AS309

    Alaska Airlines

    17:43

    IAD

    5.5h

    20:10

    LAX

    SMTWT-S
    Search

  12. AS1055

    Alaska Airlines

    21:20

    LAX

    2.6h

    23:59

    SEA

    SMTWTFS

  13. DL952

    Delta Air Lines

    17:45

    IAD

    5.9h

    Direct

    20:38

    SEA

    SMTWTFS
    Search

  14. AS396

    Alaska Airlines

    17:55

    IAD

    5.8h

    Direct

    20:46

    SEA

    -----F-
    Search

  15. AS406

    Alaska Airlines

    18:37

    IAD

    5.9h

    Direct

    21:30

    SEA

    SMTWT-S
    Search
Find more flights and airlines

Dulles International Airport to Seattle-Tacoma International Airport Flights Info

Flight distance3,705.38km
Cheapest one-way ticket priceCAD 175
Cheapest return ticket priceCAD 207

FAQs for Dulles International Airport to Seattle-Tacoma International Airport Flights

  • How long does it take to fly from Dulles International Airport (IAD) to Seattle-Tacoma International Airport (SEA)?

    It takes around 5 hours 46 minutes to fly from Dulles International Airport (IAD) to Dulles International Airport(SEA).

  • How many daily flights are there from Dulles International Airport (IAD) to Seattle-Tacoma International Airport (SEA)?

    There are around 7 daily flights from Dulles International Airport (IAD) to Seattle-Tacoma International Airport (SEA).

  • When are flight tickets from Dulles International Airport (IAD) to Seattle-Tacoma International Airport (SEA) the cheapest?

    Tickets cost around CAD 324 in May, making it the cheapest month to book. Dulles International Airport (IAD) to Seattle-Tacoma International Airport (SEA) is a popular route, so don't forget to book your tickets in advance.

  • When are flight tickets from Dulles International Airport (IAD) to Seattle-Tacoma International Airport (SEA) most expensive?

    The route from Dulles International Airport (IAD) to Seattle-Tacoma International Airport (SEA) is quite popular. Without considering departure times or holidays, tickets cost around CAD 341 in July, the most expensive month to book this route.

  • What is the transportation method from the main airport to downtown in Seattle?

    • The distance from Seattle-Tacoma International Airport to downtown is about 17km, by taxi about 30 minutes.

  • Which airline operates the most direct flights from Dulles International Airport (IAD) to Seattle-Tacoma International Airport (SEA)?

    Alaska Airlines is a very popular airline operating an average of 2185 flights per month.

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