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Seattle-Tacoma International Airport to Washington D.C. flight
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Cheap Flights from Seattle-Tacoma International Airport to Washington D.C.

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

  • One way
  • Round-trip
sortSort by: Lowest Price
  • Sort by: Lowest Price
  • Sort by: Earliest Flight
      • SEA21:49
        21h 10m
        1 stop
        DCA21:59
        Seattle - Washington D.C.|Thu, May 23|Frontier Airlines
        $52$124
        57% OFF
        57% OFF
        $124$52
      • SEA17:02
        25h 57m
        1 stop
        DCA21:59
        Seattle - Washington D.C.|Mon, May 6|Frontier Airlines
        $53$124
        57% OFF
        57% OFF
        $124$53
      • SEA21:32
        11h 28m
        1 stop
        DCA12:00
        Seattle - Washington D.C.|Sat, May 11|Frontier Airlines
        $53$124
        57% OFF
        57% OFF
        $124$53
      • SEA17:02
        25h 57m
        1 stop
        DCA21:59
        Seattle - Washington D.C.|Mon, May 13|Frontier Airlines
        $53
        $53
      • SEA22:24
        20h 35m
        1 stop
        DCA21:59
        Seattle - Washington D.C.|Fri, May 17|Frontier Airlines
        $61
        $61
      • SEA22:04
        10h 56m
        1 stop
        DCA12:00
        Seattle - Washington D.C.|Thu, May 2|Frontier Airlines
        $70
        $70
      • SEA20:14
        12h 49m
        1 stop
        DCA12:03
        Seattle - Washington D.C.|Tue, May 21|Frontier Airlines
        $71
        $71
      • SEA21:50
        21h 9m
        1 stop
        DCA21:59
        Seattle - Washington D.C.|Wed, May 15|Frontier Airlines
        $83
        $83
      • SEA09:40
        23h 23m
        1 stop
        DCA12:03
        Seattle - Washington D.C.|Mon, May 20|Frontier Airlines
        $84
        $84
      • SEA22:30
        10h 30m
        1 stop
        DCA12:00
        Seattle - Washington D.C.|Sun, May 5|Frontier Airlines
        $94
        $94
      • SEA13:00
        3h 5m
        Direct
        WAS14:00
        Seattle - Washington D.C.|Thu, May 9|Frontier 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 Washington D.C.

See which airlines fly from Seattle-Tacoma International Airport 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 $52
American Airlines
From $98
United Airlines
From $168
Jetblue Airways
From $209
Spirit Airlines
From $231
Southwest Airlines
From $246
Sun Country Airlines
From $250
Delta Air Lines
From $373
Alaska Airlines
From $455
ANA airlines
Find more flights and airlines

There are 2 airport(s) in Washington D.C.. Discover the top routes now!

Learn about different airports in Washington D.C., find the best flight and transfer options, and plan your journey.

  • 3.44 km from downtown Washington D.C.CheapestClosest
    Ronald Reagan Washington National Airport
    Tickets From
    $52
  • 36.68 km from downtown Washington D.C.
    Dulles International Airport
    Tickets From
    $288
Flight Schedule from Seattle-Tacoma International Airport to Washington D.C.

Check the schedule for flights from Seattle-Tacoma International Airport 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. AS682

    Alaska Airlines

    06:00

    SEA

    2.7h

    09:44

    DEN

    SMTWTFS
    Search

  4. F9690

    Frontier Airlines

    16:27

    DEN

    3.5h

    21:59

    DCA

    -M----S

  5. AS682

    Alaska Airlines

    06:00

    SEA

    2.7h

    09:44

    DEN

    SMTWTFS
    Search

  6. F93862

    Frontier Airlines

    12:39

    DEN

    3.4h

    18:01

    DCA

    -MT--F-

  7. AS406

    Alaska Airlines

    09:36

    SEA

    5.0h

    Direct

    17:37

    IAD

    SMTWTFS
    Search

  8. AS348

    Alaska Airlines

    16:10

    SEA

    4.8h

    Direct

    23:59

    IAD

    SMTWTFS
    Search

  9. F92150

    Frontier Airlines

    21:35

    SEA

    2.8h

    01:25

    DEN

    -M-----
    Search

  10. F9686

    Frontier Airlines

    06:39

    DEN

    3.5h

    12:09

    DCA

    SMTWTFS

  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. F91176

    Frontier Airlines

    22:08

    SEA

    2.7h

    01:51

    DEN

    S---T--
    Search

  14. F9686

    Frontier Airlines

    06:39

    DEN

    3.5h

    12:09

    DCA

    SMTWTFS

  15. DL719

    Delta Air Lines

    22:22

    SEA

    5.1h

    Direct

    06:26

    IAD

    SMTWT-S
    Search

  16. AA2361

    American Airlines

    23:40

    SEA

    5.0h

    07:38

    PHL

    SMTWTFS
    Search

  17. AA4541

    American Airlines

    10:47

    PHL

    1.1h

    11:56

    DCA

    SMTWT--
Find more flights and airlines

Flight Info of Flights from Seattle-Tacoma International Airport to Washington D.C.

Cheapest round-trip ticket price

$185

Cheapest nonstop flight price

$52

Off-season for travel

May

Peak season for travel

July

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