Flights from Seattle (SEA) to Washington, D.C. (DCA) on Alaska Airlines

Lowest fares from Seattle to Washington, D.C.

Nov 2026
From$349*
Seen: 18 hours ago
Flight Type One Way|Saver
Dec 2026
From$174*
Seen: 18 hours ago
Flight Type One Way|Saver
Jan 2027
From$204*
Seen: 18 hours ago
Flight Type One Way|Saver
cmp-daily-histogram-bars-legend-min-price-aria-label $174
cmp-daily-histogram-bars-legend-max-price-aria-label $1.3K
Displaying fares for November-2026
  • SEA–DCA, Nov 11, 2026: From $579
    11

    We

    NOV

  • SEA–DCA, Nov 12, 2026: From $579
    12

    Th

  • SEA–DCA, Nov 13, 2026: From $579
    13

    Fr

  • SEA–DCA, Nov 14, 2026: From $579
    14

    Sa

  • SEA–DCA, Nov 15, 2026: From $584
    15

    Su

  • SEA–DCA, Nov 16, 2026: From $469
    16

    Mo

  • SEA–DCA, Nov 17, 2026: From $469
    17

    Tu

  • SEA–DCA, Nov 18, 2026: From $469
    18

    We

  • SEA–DCA, Nov 19, 2026: From $469
    19

    Th

  • SEA–DCA, Nov 20, 2026: From $584
    20

    Fr

  • SEA–DCA, Nov 21, 2026: From $474
    21

    Sa

  • SEA–DCA, Nov 22, 2026: From $479
    22

    Su

  • SEA–DCA, Nov 23, 2026: From $359
    23

    Mo

  • SEA–DCA, Nov 24, 2026: From $359
    24

    Tu

  • SEA–DCA, Nov 25, 2026: From $379
    25

    We

  • SEA–DCA, Nov 26, 2026: From $359
    26

    Th

  • SEA–DCA, Nov 27, 2026: From $349
    27

    Fr

  • SEA–DCA, Nov 28, 2026: From $504
    28

    Sa

  • SEA–DCA, Nov 29, 2026: From $1,298
    29

    Su

  • SEA–DCA, Nov 30, 2026: From $784
    30

    Mo

  • SEA–DCA, Dec 1, 2026: From $344
    01

    Tu

    DEC

  • SEA–DCA, Dec 2, 2026: From $174
    02

    We

  • SEA–DCA, Dec 3, 2026: From $174
    03

    Th

  • SEA–DCA, Dec 4, 2026: From $174
    04

    Fr

  • SEA–DCA, Dec 5, 2026: From $174
    05

    Sa

  • SEA–DCA, Dec 6, 2026: From $174
    06

    Su

  • SEA–DCA, Dec 7, 2026: From $174
    07

    Mo

  • SEA–DCA, Dec 8, 2026: From $174
    08

    Tu

  • SEA–DCA, Dec 9, 2026: From $174
    09

    We

  • SEA–DCA, Dec 10, 2026: From $174
    10

    Th

    • Range$174-$1,298

    *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..*

    $
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    One-way low-fare flights Seattle to Washington, D.C..*
    From
    To
    Fare Type
    Dates
    Price
    Seattle (SEA)Washington, D.C. (DCA)One-way
    |
    Saver    		Depart: Dec 3, 2026

    From

    $174

    Seen: 18 hours ago

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

    From

    $174

    Seen: 18 hours ago

    Seattle (SEA)Washington, D.C. (DCA)One-way
    |
    Saver    		Depart: Dec 7, 2026

    From

    $174

    Seen: 18 hours ago

    Seattle (SEA)Washington, D.C. (DCA)One-way
    |
    Saver    		Depart: Dec 9, 2026

    From

    $174

    Seen: 18 hours ago

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

    From

    $174

    Seen: 18 hours ago

    Seattle (SEA)Washington, D.C. (DCA)One-way
    |
    Saver    		Depart: Dec 12, 2026

    From

    $174

    Seen: 18 hours ago

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

    From

    $174

    Seen: 18 hours ago

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

    From

    $174

    Seen: 18 hours ago

    Seattle (SEA)Washington, D.C. (IAD)One-way
    |
    Saver    		Depart: Dec 3, 2026

    From

    $174

    Seen: 18 hours ago

    Seattle (SEA)Washington, D.C. (IAD)One-way
    |
    Saver    		Depart: Dec 4, 2026

    From

    $174

    Seen: 18 hours ago

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

    From

    $174

    Seen: 18 hours ago

    Seattle (SEA)Washington, D.C. (IAD)One-way
    |
    Saver    		Depart: Dec 7, 2026

    From

    $174

    Seen: 18 hours ago

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

    From

    $174

    Seen: 18 hours ago

    Seattle (SEA)Washington, D.C. (IAD)One-way
    |
    Saver    		Depart: Dec 15, 2026

    From

    $174

    Seen: 18 hours ago

    Seattle (SEA)Washington, D.C. (IAD)One-way
    |
    Saver    		Depart: Dec 6, 2026

    From

    $174

    Seen: 18 hours ago

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

    From

    $174

    Seen: 18 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.

    Frequently Asked Questions on flights from Seattle (SEA) to Washington, D.C. (DCA)

    When is the best time to book a flight from Seattle to Washington, D.C.?

    Want to find the lowest fares by day and time flying from Seattle to Washington, D.C. on Alaska Airlines or Hawaiian Airlines? Check out our flight search widget.

    Can I earn points on my flight to Washington, D.C.?

    Yes, with Atmosâ„¢ Rewards you can earn points on flights to 1000+ destinations worldwide through the growing network of Alaska and Hawaiian Airlines. Not an Atmosâ„¢ Rewards member yet? Learn more and join today.

    Can I rent a car when I arrive at Ronald Reagan National Airport?

    Yes, you can rent a car at Ronald Reagan National Airport. Check availability and book now

    Where can I find the status of my flight to Washington, D.C.?

    You can check the status of your upcoming Alaska Airlines flight on our flight schedule page.

    Where can I find answers to questions about flying with Alaska Airlines?

    Visit the Alaska Airlines Help Center to quickly browse our help pages by category to find the information you need.

    Can I change or cancel my Alaska Airlines flight to Washington, D.C.?

    Yes, you can review, modify, or cancel a reservation from our Manage Your Reservation tool. You can learn more about our policy for changing or cancelling a reservation here. 

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