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

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

  • One way
  • Round-trip
sortSort: Price (Lowest)
  • Sort: Price (Lowest)
  • Sort: Departure (Earliest)
      • SEA18:15
        14h 52m
        1 stop
        IAD12:07
        Seattle - Washington D.C.|Sat, May 11|Sun Country Airlines
        CAD 166CAD 243
        32% OFF
        32% OFF
        CAD 243CAD 166
      • SEA16:03
        4h 56m
        Direct
        IAD23:59
        Seattle - Washington D.C.|Thu, May 2|Alaska Airlines
        CAD 169CAD 243
        30% OFF
        30% OFF
        CAD 243CAD 169
      • SEA23:28
        5h 12m
        Direct
        IAD07:40
        Seattle - Washington D.C.|Tue, May 21|Alaska Airlines
        CAD 169CAD 243
        30% OFF
        30% OFF
        CAD 243CAD 169
      • SEA16:03
        4h 56m
        Direct
        IAD23:59
        Seattle - Washington D.C.|Mon, May 6|Alaska Airlines
        CAD 178
        CAD 178
      • SEA06:00
        8h 57m
        1 stop
        IAD17:57
        Seattle - Washington D.C.|Sun, May 5|Alaska Airlines
        CAD 180
        CAD 180
      • SEA16:00
        4h 59m
        Direct
        IAD23:59
        Seattle - Washington D.C.|Wed, Jun 5|Alaska Airlines
        CAD 181
        CAD 181
      • SEA23:28
        5h 12m
        Direct
        IAD07:40
        Seattle - Washington D.C.|Tue, May 28|Alaska Airlines
        CAD 182
        CAD 182
      • SEA16:03
        4h 56m
        Direct
        IAD23:59
        Seattle - Washington D.C.|Fri, May 10|Alaska Airlines
        CAD 182
        CAD 182
      • SEA23:28
        5h 12m
        Direct
        IAD07:40
        Seattle - Washington D.C.|Thu, May 23|Alaska Airlines
        CAD 182
        CAD 182
      • SEA09:00
        5h 8m
        Direct
        IAD17:08
        Seattle - Washington D.C.|Wed, May 29|Alaska Airlines
        CAD 183
        CAD 183
      • SEA13:00
        3h 5m
        Direct
        IAD14:00
        Seattle - Washington D.C.|Thu, May 9|Sun Country 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 Seattle-Tacoma International Airport to Dulles International Airport

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

Frontier Airlines
From CAD 191
United Airlines
From CAD 232
Southwest Airlines
From CAD 338
Sun Country Airlines
From CAD 344
Spirit Airlines
From CAD 379
Alaska Airlines
From CAD 397
Jetblue Airways
From CAD 405
Delta Air Lines
From CAD 513
American Airlines
From CAD 588
ANA airlines
Find more flights and airlines

Find Cheaper Flights from Seattle to Washington D.C.

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

  • Cheapest
    Frontier Airlines
    SEA
    21:49
    21h 10m
    1 transfer
    DCA
    21:59
    Seattle-Tacoma International Airport - Ronald Reagan Washington National Airport
    Thu, May 23Frontier Airlines
    CAD 72
  • Frontier Airlines
    SEA
    21:49
    21h 10m
    1 transfer
    DCA
    21:59
    Seattle-Tacoma International Airport - Ronald Reagan Washington National Airport
    Thu, May 23Frontier Airlines
    CAD 72
    Find More Flights
Flight Schedule from Seattle-Tacoma International Airport to Dulles International Airport

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

Flight info.
Departure
Arrival
Weekly Schedule

  1. AS1180

    Alaska Airlines

    05:45

    SEA

    2.9h

    08:36

    SAN

    SMTWTFS
    Search

  2. AS322

    Alaska Airlines

    10:35

    SAN

    5.0h

    18:36

    IAD

    SMTWTFS

  3. AS338

    Alaska Airlines

    07:03

    SEA

    5.1h

    Direct

    15:07

    IAD

    S--WT-S
    Search

  4. DL952

    Delta Air Lines

    08:55

    SEA

    4.9h

    Direct

    16:50

    IAD

    SMTWTFS
    Search

  5. AS406

    Alaska Airlines

    09:36

    SEA

    5.0h

    Direct

    17:37

    IAD

    SMTWTFS
    Search

  6. SY1622

    Sun Country Airlines

    15:15

    SEA

    3.4h

    20:37

    MSP

    -----F-
    Search

  7. SY223

    Sun Country Airlines

    07:07

    MSP

    2.5h

    10:37

    IAD

    ---W--S

  8. AS348

    Alaska Airlines

    16:10

    SEA

    4.8h

    Direct

    23:59

    IAD

    SMTWTFS
    Search

  9. SY286

    Sun Country Airlines

    18:15

    SEA

    3.3h

    23:35

    MSP

    S-TWT-S
    Search

  10. SY223

    Sun Country Airlines

    07:07

    MSP

    2.5h

    10:37

    IAD

    ---W--S

  11. AA2107

    American Airlines

    21:48

    SEA

    5.0h

    05:49

    CLT

    SMTWTFS
    Search

  12. AA5132

    American Airlines

    07:20

    CLT

    1.6h

    08:54

    IAD

    S--WTFS

  13. DL719

    Delta Air Lines

    22:22

    SEA

    5.1h

    Direct

    06:26

    IAD

    SMTWT-S
    Search
Find more flights and airlines

Seattle-Tacoma International Airport to Dulles International Airport Flights Info

Flight distance3,705.38km
Cheapest one-way ticket priceCAD 165
Cheapest return ticket priceCAD 256

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

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

    It takes around 5 hours 49 minutes to fly from Seattle-Tacoma International Airport (SEA) to Seattle-Tacoma International Airport(IAD).

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

    There are around 8 daily flights from Seattle-Tacoma International Airport (SEA) to Dulles International Airport (IAD).

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

    Tickets cost around CAD 237 in June, making it the cheapest month to book. Seattle-Tacoma International Airport (SEA) to Dulles International Airport (IAD) is a popular route, so don't forget to book your tickets in advance.

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

    The route from Seattle-Tacoma International Airport (SEA) to Dulles International Airport (IAD) is quite popular. Without considering departure times or holidays, tickets cost around CAD 347 in May, the most expensive month to book this route.

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

    Alaska Airlines is a very popular airline operating an average of 3046 flights per month.

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