Southwest® flights from Washington D.C. Reagan National to Seattle/Tacoma from $209

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Low fares from Washington D.C. Reagan National to Seattle/Tacoma

$

Washington D.C. Reagan National (DCA)to

Seattle/Tacoma (SEA)
Depart: 01/06/2027

One-way

Basic

From
$209
Seen: 10 hrs ago

Washington D.C. Reagan National (DCA)to

Seattle/Tacoma (SEA)
Depart: 01/21/2027

One-way

Basic

From
$224
Seen: 22 hrs ago

Washington D.C. Reagan National (DCA)to

Seattle/Tacoma (SEA)
Depart: 12/14/2026

One-way

Basic

From
$224
Seen: 7 hrs ago

Washington D.C. Reagan National (DCA)to

Seattle/Tacoma (SEA)
Depart: 12/13/2026

One-way

Basic

From
$224
Seen: 22 hrs ago

Washington D.C. Reagan National (DCA)to

Seattle/Tacoma (SEA)
Depart: 01/04/2027

One-way

Basic

From
$229
Seen: 2 hrs ago

Washington D.C. Reagan National (DCA)to

Seattle/Tacoma (SEA)
Depart: 12/17/2026

One-way

Basic

From
$229
Seen: 17 hrs ago

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Explore flights from Washington D.C. Reagan National to Seattle/Tacoma

Nov 2026
From$349*
Seen: 18 hrs ago
One Way/Basic
Dec 2026
From$224*
Seen: 7 hrs ago
One Way/Basic
Jan 2027
From$209*
Seen: 10 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $244
cmp-daily-histogram-bars-legend-max-price-aria-label $751
Displaying fares for November-2026
  • DCA–SEA: cmp-view-offers-disclaimer. Find Offers
    12

    Thu

    NOV

  • DCA–SEA, 11/13/2026: From $589
    13

    Fri

  • DCA–SEA, 11/14/2026: From $589
    14

    Sat

  • DCA–SEA, 11/15/2026: From $589
    15

    Sun

  • DCA–SEA, 11/16/2026: From $589
    16

    Mon

  • DCA–SEA, 11/17/2026: From $589
    17

    Tue

  • DCA–SEA, 11/18/2026: From $469
    18

    Wed

  • DCA–SEA, 11/19/2026: From $469
    19

    Thu

  • DCA–SEA: cmp-view-offers-disclaimer. Find Offers
    20

    Fri

  • DCA–SEA: cmp-view-offers-disclaimer. Find Offers
    21

    Sat

  • DCA–SEA: cmp-view-offers-disclaimer. Find Offers
    22

    Sun

  • DCA–SEA: cmp-view-offers-disclaimer. Find Offers
    23

    Mon

  • DCA–SEA, 11/24/2026: From $469
    24

    Tue

  • DCA–SEA: cmp-view-offers-disclaimer. Find Offers
    25

    Wed

  • DCA–SEA, 11/26/2026: From $349
    26

    Thu

  • DCA–SEA, 11/27/2026: From $387
    27

    Fri

  • DCA–SEA, 11/28/2026: From $751
    28

    Sat

  • DCA–SEA: cmp-view-offers-disclaimer. Find Offers
    29

    Sun

  • DCA–SEA: cmp-view-offers-disclaimer. Find Offers
    30

    Mon

  • DCA–SEA: cmp-view-offers-disclaimer. Find Offers
    01

    Tue

    DEC

  • DCA–SEA: cmp-view-offers-disclaimer. Find Offers
    02

    Wed

  • DCA–SEA: cmp-view-offers-disclaimer. Find Offers
    03

    Thu

  • DCA–SEA, 12/04/2026: From $264
    04

    Fri

  • DCA–SEA, 12/05/2026: From $254
    05

    Sat

  • DCA–SEA: cmp-view-offers-disclaimer. Find Offers
    06

    Sun

  • DCA–SEA: cmp-view-offers-disclaimer. Find Offers
    07

    Mon

  • DCA–SEA, 12/08/2026: From $249
    08

    Tue

  • DCA–SEA: cmp-view-offers-disclaimer. Find Offers
    09

    Wed

  • DCA–SEA, 12/10/2026: From $249
    10

    Thu

  • DCA–SEA, 12/11/2026: From $244
    11

    Fri

    • Range$244-$751

    *Fares displayed have been collected within the last 24 hours and may no longer be available at time of booking. Additional fees and charges for optional products and services may apply. Modifying this information may result in a different fare. To find the most updated fare, please visit Southwest.com. Fares listed are Basic, which are subject to additional terms and conditions.

    Flight Details

    Departing from:
    Ronald Reagan National Airport
    Arriving at:
    Seattle/Tacoma International Airport
    Distance:
    2329 miles

    Questions we hear the most

    There are 70 weekly flights from Washington, D.C. (Reagan National) to Seattle/Tacoma on Southwest Airlines.
    To find the lowest fares by day and time to fly Washington, D.C. (Reagan National) to Seattle/Tacoma with Southwest, check out our Low Fare Calendar.
    You can rent a car at Seattle/Tacoma International Airport book yours with your flight.
    Yes! Flights from Washington, D.C. (Reagan National) to Seattle/Tacoma—or from here or there to anywhere—can be changed with no change fees. Fare difference may apply.
    Check the status of your upcoming Southwest flight.
    Check out the Southwest Airlines® Help Center for answers about everything Southwest.

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