Alaska Airlines Flights from Seattle to Washington, D.C.

Lowest fares from Seattle to Washington, D.C.

Aug 2026
From$173*
Seen: 19 hours ago
Flight Type One Way|Saver
Sep 2026
From$163*
Seen: 19 hours ago
Flight Type One Way|Saver
Oct 2026
From$199*
Seen: 19 hours ago
Flight Type One Way|Saver
cmp-daily-histogram-bars-legend-min-price-aria-label $163
cmp-daily-histogram-bars-legend-max-price-aria-label $649
Displaying fares for August-2026
  • SEA–DCA, Aug 9, 2026: From $564
    09

    Su

    AUG

  • SEA–DCA, Aug 10, 2026: From $649
    10

    Mo

  • SEA–DCA, Aug 11, 2026: From $554
    11

    Tu

  • SEA–DCA, Aug 12, 2026: From $649
    12

    We

  • SEA–DCA, Aug 13, 2026: From $649
    13

    Th

  • SEA–DCA, Aug 14, 2026: From $489
    14

    Fr

  • SEA–DCA, Aug 15, 2026: From $434
    15

    Sa

  • SEA–DCA, Aug 16, 2026: From $439
    16

    Su

  • SEA–DCA, Aug 17, 2026: From $489
    17

    Mo

  • SEA–DCA, Aug 18, 2026: From $434
    18

    Tu

  • SEA–DCA, Aug 19, 2026: From $444
    19

    We

  • SEA–DCA, Aug 20, 2026: From $434
    20

    Th

  • SEA–DCA, Aug 21, 2026: From $389
    21

    Fr

  • SEA–DCA, Aug 22, 2026: From $514
    22

    Sa

  • SEA–DCA, Aug 23, 2026: From $554
    23

    Su

  • SEA–DCA, Aug 24, 2026: From $469
    24

    Mo

  • SEA–DCA, Aug 25, 2026: From $314
    25

    Tu

  • SEA–DCA, Aug 26, 2026: From $314
    26

    We

  • SEA–DCA, Aug 27, 2026: From $324
    27

    Th

  • SEA–DCA, Aug 28, 2026: From $314
    28

    Fr

  • SEA–DCA, Aug 29, 2026: From $173
    29

    Sa

  • SEA–DCA, Aug 30, 2026: From $344
    30

    Su

  • SEA–DCA, Aug 31, 2026: From $208
    31

    Mo

  • SEA–DCA, Sep 1, 2026: From $173
    01

    Tu

    SEP

  • SEA–DCA, Sep 2, 2026: From $163
    02

    We

  • SEA–DCA, Sep 3, 2026: From $208
    03

    Th

  • SEA–DCA, Sep 4, 2026: From $236
    04

    Fr

  • SEA–DCA, Sep 5, 2026: From $163
    05

    Sa

  • SEA–DCA, Sep 6, 2026: From $243
    06

    Su

  • SEA–DCA, Sep 7, 2026: From $451
    07

    Mo

  • SEA–DCA, Sep 8, 2026: From $249
    08

    Tu

    • Range$163-$649

    *Displayed prices have been available within the past 24 hours and may not be available at the time of booking. Fares listed may be Saver fares, which is our most restrictive fare option and subject to additional restrictions. For roundtrip journeys, the price displayed—available within the past 24 hours—is the aggregate of the lowest available fare each way. Additional baggage charges and fees for optional products and services may apply. Other terms and conditions may apply.

    One-way low-fare flights Seattle to Washington, D.C..*

    $
    keyboard_arrow_down
    One-way low-fare flights Seattle to Washington, D.C..*
    From
    To
    Fare Type
    Dates
    Price
    Seattle (SEA)Washington, D.C. (IAD)One-way
    |
    Saver    		Depart: Sep 1, 2026

    From

    $163

    Seen: 19 hours ago

    Seattle (SEA)Washington, D.C. (IAD)One-way
    |
    Saver    		Depart: Sep 11, 2026

    From

    $163

    Seen: 19 hours ago

    Seattle (SEA)Washington, D.C. (IAD)One-way
    |
    Saver    		Depart: Sep 16, 2026

    From

    $163

    Seen: 19 hours ago

    Seattle (SEA)Washington, D.C. (IAD)One-way
    |
    Saver    		Depart: Sep 19, 2026

    From

    $163

    Seen: 19 hours ago

    Seattle (SEA)Washington, D.C. (IAD)One-way
    |
    Saver    		Depart: Sep 27, 2026

    From

    $163

    Seen: 19 hours ago

    Seattle (SEA)Washington, D.C. (IAD)One-way
    |
    Saver    		Depart: Sep 30, 2026

    From

    $163

    Seen: 19 hours ago

    Seattle (SEA)Washington, D.C. (IAD)One-way
    |
    Saver    		Depart: Sep 21, 2026

    From

    $163

    Seen: 19 hours ago

    Seattle (SEA)Washington, D.C. (IAD)One-way
    |
    Saver    		Depart: Sep 29, 2026

    From

    $163

    Seen: 19 hours ago

    Seattle (SEA)Washington, D.C. (DCA)One-way
    |
    Saver    		Depart: Sep 5, 2026

    From

    $163

    Seen: 19 hours ago

    Seattle (SEA)Washington, D.C. (DCA)One-way
    |
    Saver    		Depart: Sep 1, 2026

    From

    $173

    Seen: 19 hours ago

    Seattle (SEA)Washington, D.C. (DCA)One-way
    |
    Saver    		Depart: Sep 10, 2026

    From

    $173

    Seen: 19 hours ago

    Seattle (SEA)Washington, D.C. (DCA)One-way
    |
    Saver    		Depart: Sep 16, 2026

    From

    $173

    Seen: 19 hours ago

    Seattle (SEA)Washington, D.C. (DCA)One-way
    |
    Saver    		Depart: Sep 19, 2026

    From

    $173

    Seen: 19 hours ago

    Seattle (SEA)Washington, D.C. (DCA)One-way
    |
    Saver    		Depart: Aug 29, 2026

    From

    $173

    Seen: 19 hours ago

    Seattle (SEA)Washington, D.C. (DCA)One-way
    |
    Saver    		Depart: Sep 2, 2026

    From

    $163

    Seen: 5 hours ago

    Seattle (SEA)Washington, D.C. (DCA)One-way
    |
    Saver    		Depart: Sep 30, 2026

    From

    $165

    Seen: 9 hours ago

    *Displayed prices have been available within the past 24 hours and may not be available at the time of booking. Fares listed may be Saver fares, which is our most restrictive fare option and subject to additional restrictions. For roundtrip journeys, the price displayed—available within the past 24 hours—is the aggregate of the lowest available fare each way. Additional baggage charges and fees for optional products and services may apply. Other terms and conditions may apply.

    Explore Alaska Airlines's Flights to Top-Pick Destinations