Southwest® flights from Seattle/Tacoma to Washington D.C. Reagan National from $171

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

$

Seattle/Tacoma (SEA)to

Washington D.C. Reagan National (DCA)
Depart: 01/21/2027

One-way

Basic

From
$171
Seen: 10 hrs ago

Seattle/Tacoma (SEA)to

Washington D.C. Reagan National (DCA)
Depart: 12/05/2026

One-way

Basic

From
$171
Seen: 4 hrs ago

Seattle/Tacoma (SEA)to

Washington D.C. Reagan National (DCA)
Depart: 12/01/2026

One-way

Basic

From
$199
Seen: 20 hrs ago

Seattle/Tacoma (SEA)to

Washington D.C. Reagan National (DCA)
Depart: 12/04/2026

One-way

Basic

From
$205
Seen: 4 hrs ago

Seattle/Tacoma (SEA)to

Washington D.C. Reagan National (DCA)
Depart: 11/19/2026

One-way

Basic

From
$219
Seen: 16 hrs ago

Seattle/Tacoma (SEA)to

Washington D.C. Reagan National (DCA)
Depart: 01/21/2027

One-way

Choice

From
$231
Seen: 10 hrs ago

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

Oct 2026
From$464*
Seen: 3 hrs ago
One Way/Basic
Nov 2026
From$219*
Seen: 16 hrs ago
One Way/Basic
Dec 2026
From$171*
Seen: 4 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $219
Displaying fares for October-2026
  • SEA–DCA, 10/20/2026: From $604
    20

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    OCT

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  • SEA–DCA, 10/25/2026: From $604
    25

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  • SEA–DCA, 10/26/2026: From $464
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  • SEA–DCA, 11/08/2026: From $375
    08

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    09

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  • SEA–DCA, 11/11/2026: From $274
    11

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    12

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    16

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    17

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    18

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  • SEA–DCA, 11/19/2026: From $219
    19

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    • Range$219-$604

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

    Questions we hear the most

    There are 58 weekly flights from Seattle/Tacoma to Washington, D.C. (Reagan National) on Southwest Airlines.
    To find the lowest fares by day and time to fly Seattle/Tacoma to Washington, D.C. (Reagan National) with Southwest, check out our Low Fare Calendar.
    You can rent a car at Ronald Reagan National Airport book yours with your flight.
    Yes! Flights from Seattle/Tacoma to Washington, D.C. (Reagan National)—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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