Southwest® flights from Seattle/Tacoma to Washington, D.C. (Reagan National) from $199

Promo Code

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

$

Seattle/Tacoma (SEA)to

Washington, D.C. (Reagan National) (DCA)
Depart: 10/21/2026

One-way

Basic

From
$199
Seen: 18 hrs ago

Seattle/Tacoma (SEA)to

Washington, D.C. (Reagan National) (DCA)
Depart: 10/04/2026

One-way

Basic

From
$199
Seen: 22 hrs ago

Seattle/Tacoma (SEA)to

Washington, D.C. (Reagan National) (DCA)
Depart: 10/16/2026

One-way

Basic

From
$204
Seen: 5 hrs ago

Seattle/Tacoma (SEA)to

Washington, D.C. (Reagan National) (DCA)
Depart: 10/14/2026

One-way

Basic

From
$204
Seen: 11 hrs ago

Seattle/Tacoma (SEA)to

Washington, D.C. (Reagan National) (DCA)
Depart: 09/17/2026

One-way

Basic

From
$219
Seen: 19 hrs ago

Seattle/Tacoma (SEA)to

Washington, D.C. (Reagan National) (DCA)
Depart: 09/14/2026

One-way

Basic

From
$219
Seen: 23 hrs ago

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

Aug 2026
From$434*
Seen: 7 minutes ago
One Way/Basic
Sep 2026
From$219*
Seen: 19 hrs ago
One Way/Basic
Oct 2026
From$199*
Seen: 18 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $219
cmp-daily-histogram-bars-legend-max-price-aria-label $564
Displaying fares for August-2026
  • SEA–DCA: cmp-view-offers-disclaimer. Find Offers
    21

    Fri

    AUG

  • SEA–DCA, 08/22/2026: From $564
    22

    Sat

  • SEA–DCA, 08/23/2026: From $564
    23

    Sun

  • SEA–DCA: cmp-view-offers-disclaimer. Find Offers
    24

    Mon

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

    Tue

  • SEA–DCA: cmp-view-offers-disclaimer. Find Offers
    26

    Wed

  • SEA–DCA, 08/27/2026: From $434
    27

    Thu

  • SEA–DCA: cmp-view-offers-disclaimer. Find Offers
    28

    Fri

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

    Sat

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

    Sun

  • SEA–DCA: cmp-view-offers-disclaimer. Find Offers
    31

    Mon

  • SEA–DCA, 09/01/2026: From $434
    01

    Tue

    SEP

  • SEA–DCA, 09/02/2026: From $434
    02

    Wed

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

    Thu

  • SEA–DCA: cmp-view-offers-disclaimer. Find Offers
    04

    Fri

  • SEA–DCA: cmp-view-offers-disclaimer. Find Offers
    05

    Sat

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

    Sun

  • SEA–DCA, 09/07/2026: From $434
    07

    Mon

  • SEA–DCA, 09/08/2026: From $314
    08

    Tue

  • SEA–DCA, 09/09/2026: From $314
    09

    Wed

  • SEA–DCA: cmp-view-offers-disclaimer. Find Offers
    10

    Thu

  • SEA–DCA: cmp-view-offers-disclaimer. Find Offers
    11

    Fri

  • SEA–DCA, 09/12/2026: From $219
    12

    Sat

  • SEA–DCA, 09/13/2026: From $239
    13

    Sun

  • SEA–DCA, 09/14/2026: From $219
    14

    Mon

  • SEA–DCA, 09/15/2026: From $219
    15

    Tue

  • SEA–DCA, 09/16/2026: From $219
    16

    Wed

  • SEA–DCA, 09/17/2026: From $219
    17

    Thu

  • SEA–DCA, 09/18/2026: From $239
    18

    Fri

  • SEA–DCA, 09/19/2026: From $219
    19

    Sat

  • SEA–DCA, 09/20/2026: From $239
    20

    Sun

    • Range$219-$564

    *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

    Route Information

    58† Weekly flights

    † Weekly flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025. Note: route may not operate every day of the week.

    ‡ Nonstop flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025.

    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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