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Low Price Flights from Seattle to Washington D.C.
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Cheap Flight Deals from Seattle to Washington D.C.

For as little as AU$ 164, you can take your next adventure to Washington D.C. without breaking the bank. Choose between one-way and return tickets from Seattle below.

  • One way
  • Return
      • Cheapest nonstop
        SEA09:54
        5h 3m
        Nonstop
        IAD17:57
        Wed, Jan 8|Seattle - Washington D.C.|Alaska Airlines
        AU$ 164AU$ 336
        51% OFF
        51% OFF
        AU$ 336AU$ 164

        Choose Alaska Airlines flights from Seattle to Washington D.C.. The one-way direct flight with Alaska Airlines departs from Seattle-Tacoma International Airport on Wed, Jan 8, arriving at Washington Dulles International Airport. One-way Prices start from AU$ 164 including taxes and charges.

      • SEA21:39
        5h 1m
        Nonstop
        IAD05:40
        Wed, Dec 25|Seattle - Washington D.C.|Alaska Airlines
        AU$ 169AU$ 336
        50% OFF
        50% OFF
        AU$ 336AU$ 169

        Choose Alaska Airlines flights from Seattle to Washington D.C.. The one-way direct flight with Alaska Airlines departs from Seattle-Tacoma International Airport on Wed, Dec 25, arriving at Washington Dulles International Airport. One-way Prices start from AU$ 169 including taxes and charges.

      • SEA15:15
        17h 51m
        1 stop
        DCA12:06
        Thu, Jan 23|Seattle - Washington D.C.|Frontier Airlines
        AU$ 104AU$ 336
        69% OFF
        69% OFF
        AU$ 336AU$ 104

        Choose Frontier Airlines flights from Seattle to Washington D.C.. The one-way connecting flight with Frontier Airlines departs from Seattle-Tacoma International Airport on Thu, Jan 23, arriving at Ronald Reagan Washington National Airport. One-way Prices start from AU$ 104 including taxes and charges.

      • SEA15:15
        17h 51m
        1 stop
        DCA12:06
        Mon, Feb 3|Seattle - Washington D.C.|Frontier Airlines
        AU$ 104
        AU$ 104

        Choose Frontier Airlines flights from Seattle to Washington D.C.. The one-way connecting flight with Frontier Airlines departs from Seattle-Tacoma International Airport on Mon, Feb 3, arriving at Ronald Reagan Washington National Airport. One-way Prices start from AU$ 104 including taxes and charges.

      • SEA22:08
        11h 1m
        1 stop
        DCA12:09
        Mon, Dec 9|Seattle - Washington D.C.|Frontier Airlines
        AU$ 106
        AU$ 106

        Choose Frontier Airlines flights from Seattle to Washington D.C.. The one-way connecting flight with Frontier Airlines departs from Seattle-Tacoma International Airport on Mon, Dec 9, arriving at Ronald Reagan Washington National Airport. One-way Prices start from AU$ 106 including taxes and charges.

      • SEA22:08
        11h 1m
        1 stop
        DCA12:09
        Wed, Dec 4|Seattle - Washington D.C.|Frontier Airlines
        AU$ 106
        AU$ 106

        Choose Frontier Airlines flights from Seattle to Washington D.C.. The one-way connecting flight with Frontier Airlines departs from Seattle-Tacoma International Airport on Wed, Dec 4, arriving at Ronald Reagan Washington National Airport. One-way Prices start from AU$ 106 including taxes and charges.

      • SEA15:15
        17h 46m
        1 stop
        DCA12:01
        Mon, Jan 13|Seattle - Washington D.C.|Frontier Airlines
        AU$ 106
        AU$ 106

        Choose Frontier Airlines flights from Seattle to Washington D.C.. The one-way connecting flight with Frontier Airlines departs from Seattle-Tacoma International Airport on Mon, Jan 13, arriving at Ronald Reagan Washington National Airport. One-way Prices start from AU$ 106 including taxes and charges.

      • SEA15:15
        17h 46m
        1 stop
        DCA12:01
        Thu, Jan 9|Seattle - Washington D.C.|Frontier Airlines
        AU$ 106
        AU$ 106

        Choose Frontier Airlines flights from Seattle to Washington D.C.. The one-way connecting flight with Frontier Airlines departs from Seattle-Tacoma International Airport on Thu, Jan 9, arriving at Ronald Reagan Washington National Airport. One-way Prices start from AU$ 106 including taxes and charges.

      • SEA15:15
        17h 51m
        1 stop
        DCA12:06
        Mon, Jan 27|Seattle - Washington D.C.|Frontier Airlines
        AU$ 109
        AU$ 109

        Choose Frontier Airlines flights from Seattle to Washington D.C.. The one-way connecting flight with Frontier Airlines departs from Seattle-Tacoma International Airport on Mon, Jan 27, arriving at Ronald Reagan Washington National Airport. One-way Prices start from AU$ 109 including taxes and charges.

      • SEA15:15
        17h 51m
        1 stop
        DCA12:06
        Thu, Jan 30|Seattle - Washington D.C.|Frontier Airlines
        AU$ 110
        AU$ 110

        Choose Frontier Airlines flights from Seattle to Washington D.C.. The one-way connecting flight with Frontier Airlines departs from Seattle-Tacoma International Airport on Thu, Jan 30, arriving at Ronald Reagan Washington National Airport. One-way Prices start from AU$ 110 including taxes and charges.

      • SEA13:00
        3h 5m
        Nonstop
        WAS14:00
        Thu, Nov 28|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.

Best Time to Book Flights from Seattle to Washington D.C.

Explore the best time to buy affordable tickets to Washington D.C. with our price trend chart, which predicts how flight prices will change in the coming weeks from previous data.

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

Top 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.

Frontier Airlines
From AU$ 104
Alaska Airlines
From AU$ 142
Delta Air Lines
From AU$ 175
American Airlines
From AU$ 179
United Airlines
From AU$ 192
Sun Country Airlines
From AU$ 212
Southwest Airlines
From AU$ 228
Jetblue Airways
From AU$ 229
Spirit Airlines
From AU$ 1,145

Find more flights and airlines

Alternative Routes from Seattle to Washington D.C.

Did you know that you can save money and time on an alternative route from Seattle to Washington D.C.? Check out some of the different available routes below.

  • Cheapest
    Frontier Airlines
    SEA
    15:15
    17h 51m
    1 transfer
    DCA
    12:06
    Seattle-Tacoma International Airport - Ronald Reagan Washington National Airport
    Mon, Feb 3Frontier Airlines
    AU$ 104
  • Alaska Airlines
    SEA
    09:54
    5h 3m
    Nonstop
    IAD
    17:57
    Seattle-Tacoma International Airport - Dulles International Airport
    Wed, Jan 8Alaska Airlines
    AU$ 164
  • Alaska Airlines
    SEA
    09:54
    5h 3m
    Nonstop
    IAD
    17:57
    Seattle-Tacoma International Airport - Dulles International Airport
    Wed, Jan 8Alaska Airlines
    AU$ 164
    Find More Flights

FAQ

  • When are flight 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 lowest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much are flights from Seattle (SEA) to Washington D.C. (WAS) cost?

    According to Trip.com's data, the lowest price is around AU$ 454.

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

    It takes about 5 hours 8 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 16:17.

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

    The latest flight departs from Seattle (SEA) at 21:59 and arrives in Washington D.C. (IAD) at 05:56.

  • 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. (WAS)?

    There are 2 airport(s) in Washington D.C. (WAS): Ronald Reagan Washington National Airport and Dulles International Airport.

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

If you leave it until the last minute and forget to check some of the key information when booking tickets, prices can often end up skyrocketing. Below, you can find our top tips for getting the best value flights – from changing dates to chasing deals, there are plenty ways to keep your next trip affordable.
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

Flight Information from Seattle to Washington D.C.

Cheapest direct flight priceAU$ 104
Cheapest return ticket priceAU$ 282
Off-season for travelNovember
Peak season for travelAugust
Flight distance3,736.07km
Average flight time5 hours 8 minutes
Popular airlineAmerican Airlines

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