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Cheap Flights from Seattle to Washington D.C.
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Cheap Flights from Seattle to Washington D.C. starting at S$ 94

Discover our range of affordable one-way and round-trip flights from Seattle to Washington D.C. and kick-start your next adventure today!

  • One way
  • Round-trip
      • Cheapest nonstop
        SEA09:54
        5h 3m
        Nonstop
        IAD17:57
        Wed, Feb 12|Seattle - Washington D.C.|Alaska Airlines
        S$ 166S$ 187
        12% OFF
        12% OFF
        S$ 187S$ 166

        Fly from Seattle to Washington D.C. on Wed, Feb 12 with Alaska Airlines. One-way direct flights with Alaska Airlines depart Seattle-Tacoma International Airport and arrive Dulles International Airport starting at S$ 166 including taxes and charges.

      • SEA09:50
        4h 58m
        Nonstop
        IAD17:48
        Thu, Feb 20|Seattle - Washington D.C.|Alaska Airlines
        S$ 167S$ 187
        11% OFF
        11% OFF
        S$ 187S$ 167

        Fly from Seattle to Washington D.C. on Thu, Feb 20 with Alaska Airlines. One-way direct flights with Alaska Airlines depart Seattle-Tacoma International Airport and arrive Dulles International Airport starting at S$ 167 including taxes and charges.

      • SEA14:02
        19h 1m
        1 stop
        DCA12:03
        Thu, Feb 27|Seattle - Washington D.C.|Frontier Airlines
        S$ 94S$ 187
        50% OFF
        50% OFF
        S$ 187S$ 94

        Fly from Seattle to Washington D.C. on Thu, Feb 27 with Frontier Airlines. One-way connecting flights with Frontier Airlines depart Seattle-Tacoma International Airport and arrive Ronald Reagan Washington National Airport starting at S$ 94 including taxes and charges.

      • SEA13:36
        19h 27m
        1 stop
        DCA12:03
        Wed, Mar 5|Seattle - Washington D.C.|Frontier Airlines
        S$ 95
        S$ 95

        Fly from Seattle to Washington D.C. on Wed, Mar 5 with Frontier Airlines. One-way connecting flights with Frontier Airlines depart Seattle-Tacoma International Airport and arrive Ronald Reagan Washington National Airport starting at S$ 95 including taxes and charges.

      • SEA13:36
        19h 27m
        1 stop
        DCA12:03
        Wed, Feb 26|Seattle - Washington D.C.|Frontier Airlines
        S$ 95
        S$ 95

        Fly from Seattle to Washington D.C. on Wed, Feb 26 with Frontier Airlines. One-way connecting flights with Frontier Airlines depart Seattle-Tacoma International Airport and arrive Ronald Reagan Washington National Airport starting at S$ 95 including taxes and charges.

      • SEA13:36
        19h 27m
        1 stop
        DCA12:03
        Sat, Mar 1|Seattle - Washington D.C.|Frontier Airlines
        S$ 95
        S$ 95

        Fly from Seattle to Washington D.C. on Sat, Mar 1 with Frontier Airlines. One-way connecting flights with Frontier Airlines depart Seattle-Tacoma International Airport and arrive Ronald Reagan Washington National Airport starting at S$ 95 including taxes and charges.

      • SEA14:02
        23h 57m
        1 stop
        DCA16:59
        Thu, Mar 6|Seattle - Washington D.C.|Frontier Airlines
        S$ 95
        S$ 95

        Fly from Seattle to Washington D.C. on Thu, Mar 6 with Frontier Airlines. One-way connecting flights with Frontier Airlines depart Seattle-Tacoma International Airport and arrive Ronald Reagan Washington National Airport starting at S$ 95 including taxes and charges.

      • SEA06:00
        27h 9m
        1 stop
        DCA12:09
        Wed, Apr 23|Seattle - Washington D.C.|Frontier Airlines
        S$ 96
        S$ 96

        Fly from Seattle to Washington D.C. on Wed, Apr 23 with Frontier Airlines. One-way connecting flights with Frontier Airlines depart Seattle-Tacoma International Airport and arrive Ronald Reagan Washington National Airport starting at S$ 96 including taxes and charges.

      • SEA13:36
        19h 27m
        1 stop
        DCA12:03
        Sat, Feb 22|Seattle - Washington D.C.|Frontier Airlines
        S$ 98
        S$ 98

        Fly from Seattle to Washington D.C. on Sat, Feb 22 with Frontier Airlines. One-way connecting flights with Frontier Airlines depart Seattle-Tacoma International Airport and arrive Ronald Reagan Washington National Airport starting at S$ 98 including taxes and charges.

      • SEA14:02
        19h 1m
        1 stop
        DCA12:03
        Mon, Mar 10|Seattle - Washington D.C.|Frontier Airlines
        S$ 99
        S$ 99

        Fly from Seattle to Washington D.C. on Mon, Mar 10 with Frontier Airlines. One-way connecting flights with Frontier Airlines depart Seattle-Tacoma International Airport and arrive Ronald Reagan Washington National Airport starting at S$ 99 including taxes and charges.

      • SEA01:00 pm
        3h 5m
        Nonstop
        WAS02:00 pm
        Thu, Feb 13|Seattle - Washington D.C.|Alaska Airlines
        Find More Flights
        Find More Flights

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Seattle to Washington D.C. Flight Time

Flight info.
Departure
Arrival
Weekly Schedule

  1. UA2269

    United Airlines

    05:00

    SEA

    2.7h

    08:43

    DEN

    SMTWTFS
    Search

  2. F9690

    Frontier Airlines

    16:25

    DEN

    3.6h

    21:59

    DCA

    SMTWTFS

  3. F93406

    Frontier Airlines

    06:00

    SEA

    2.9h

    09:51

    DEN

    SMTWTFS
    Search

  4. F9686

    Frontier Airlines

    06:40

    DEN

    3.5h

    12:07

    DCA

    SMTWTFS

  5. AS004

    Alaska Airlines

    08:24

    SEA

    5.2h

    Nonstop

    16:38

    DCA

    SMTWTFS
    Search

  6. AS406

    Alaska Airlines

    10:06

    SEA

    5.1h

    Nonstop

    18:13

    IAD

    SMTWTFS
    Search

  7. F94988

    Frontier Airlines

    10:38

    SEA

    2.1h

    13:45

    SLC

    ---W--S
    Search

  8. F93982

    Frontier Airlines

    14:57

    SLC

    1.6h

    16:32

    DEN

    SMTWTFS

  9. F9686

    Frontier Airlines

    06:40

    DEN

    3.5h

    12:07

    DCA

    SMTWTFS

  10. AA2398

    American Airlines

    13:35

    SEA

    4.1h

    19:40

    ORD

    SMTWTFS
    Search

  11. AA903

    American Airlines

    20:17

    ORD

    2.0h

    23:18

    DCA

    SMTWTFS

  12. AS002

    Alaska Airlines

    13:50

    SEA

    5.2h

    Nonstop

    21:59

    DCA

    SMTWTFS
    Search

  13. DL508

    Delta Air Lines

    22:08

    SEA

    5.0h

    Nonstop

    06:10

    IAD

    SMTWTFS
    Search

  14. AA2793

    American Airlines

    22:10

    SEA

    5.2h

    06:21

    CLT

    SMTWTFS
    Search

  15. AA5223

    American Airlines

    07:15

    CLT

    1.4h

    08:42

    IAD

    SMTWTFS

  16. AS307

    Alaska Airlines

    23:30

    SEA

    5.1h

    Nonstop

    07:36

    IAD

    ---W---
    Search
Find more flights and airlines

Cheapest time to fly from Seattle to Washington D.C.

Price trend charts are a great way of tracking how much your flights cost in the lead up to departure and can help you choose when to book your tickets. See how prices to Washington D.C. from Seattle have changed and are set to move below.

Displayed prices are calculated based on the lowest average weekly prices of the corresponding route on Trip.com.

Cheapest Airlines flying from Seattle to Washington D.C.

Which airline provides the cheapest flights from Seattle to Washington D.C.? Discover the option that best suits your travel needs before embarking on your journey.
Alaska Airlines logoAlaska Airlines

Frequently Asked Questions

  • When to buy flight tickets from Seattle (SEA) to Washington D.C. (WAS) the cheapest?

    Airlines adjust prices for flights from Seattle to Washington D.C. based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the cheapest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much is a flight from Seattle (SEA) to Washington D.C. (WAS) cost?

    According to Trip.com's data, the lowest price is around S$ 397.

  • How long is a flight from Seattle (SEA) to Washington D.C. (WAS)?

    It takes about 5 hours 18 minutes to fly from Seattle (SEA) to Washington D.C. (WAS).

  • What time does the earliest flight from Seattle to Washington D.C. depart?

    The earliest flight departs from Seattle (SEA) at 08:05 and arrives in Washington D.C. (IAD) at 16:03.

  • What time does the latest flight from Seattle to Washington D.C. depart?

    The latest flight departs from Seattle (SEA) at 21:40 and arrives in Washington D.C. (IAD) at 05:32.

  • What are the most popular airlines that fly from Seattle (SEA) to Washington D.C. (WAS)?

  • What's the most popular airline for direct flights from Seattle (SEA) to Washington D.C. (WAS)?

    Delta Air Lines operates 3 direct flights from Seattle (SEA) to Washington D.C. (WAS).

  • How many airports in Washington D.C.?

    There are 2 airports near Washington D.C.: Ronald Reagan Washington National Airport and Dulles International Airport.

How to find a cheap flight from Seattle to Washington D.C.

If you don’t know some of the key things to look out for when buying flight tickets, prices can often end up sky high or, worse, sold out! We’ve carefully compiled our six most important steps to help ensure you’re getting the best deals when planning your next journey.
1
Book Early
Once prices are gone, they're gone. Lock in deals while you can!
2
Compare Flight Prices
Compare prices on travel agency and airline websites.
3
Look Out for Deals
Check airline and travel agency websites for latest flight deals
4
Check One-way Fares
Buying two cheap one-way flights can sometimes be a better deal than a round-trip.
5
Try Different Dates
Flying during the week, early in the morning, or late at night can help save money.
6
Use the Trip.com App
Save up to £10 per person when booking your flights on Trip.com

Find cheapest flight ticket from Seattle to Washington D.C.

Cheapest direct flight priceS$ 94
Cheapest return ticket priceS$ 260
Off-season for travelJanuary
Peak season for travelMay
Flight distance3,736.07km
Average flight time5 hours 18 minutes
Popular airlineAlaska Airlines

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