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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$ 144

Whether you’re going for a one-way or round-trip to Washington D.C., we’ve got you covered! Check out these different flight options from Seattle below.

  • One way
  • Round-trip
      • Cheapest nonstop
        SEA09:54
        5h 3m
        Nonstop
        IAD17:57
        Wed, Jan 8|Seattle - Washington D.C.|Alaska Airlines
        S$ 144S$ 294
        51% OFF
        51% OFF
        S$ 294S$ 144

        Fly from Seattle to Washington D.C. on Wed, Jan 8 with Alaska Airlines. One-way direct flights with Alaska Airlines depart Seattle-Tacoma International Airport and arrive Washington Dulles International Airport starting at S$ 144 including taxes and charges.

      • SEA21:39
        5h 1m
        Nonstop
        IAD05:40
        Wed, Dec 25|Seattle - Washington D.C.|Alaska Airlines
        S$ 148S$ 294
        50% OFF
        50% OFF
        S$ 294S$ 148

        Fly from Seattle to Washington D.C. on Wed, Dec 25 with Alaska Airlines. One-way direct flights with Alaska Airlines depart Seattle-Tacoma International Airport and arrive Washington Dulles International Airport starting at S$ 148 including taxes and charges.

      • SEA15:15
        17h 51m
        1 stop
        DCA12:06
        Thu, Jan 23|Seattle - Washington D.C.|Frontier Airlines
        S$ 91S$ 294
        69% OFF
        69% OFF
        S$ 294S$ 91

        Fly from Seattle to Washington D.C. on Thu, Jan 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$ 91 including taxes and charges.

      • SEA15:15
        17h 51m
        1 stop
        DCA12:06
        Mon, Feb 3|Seattle - Washington D.C.|Frontier Airlines
        S$ 91
        S$ 91

        Fly from Seattle to Washington D.C. on Mon, Feb 3 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$ 91 including taxes and charges.

      • SEA22:08
        11h 1m
        1 stop
        DCA12:09
        Mon, Dec 9|Seattle - Washington D.C.|Frontier Airlines
        S$ 92
        S$ 92

        Fly from Seattle to Washington D.C. on Mon, Dec 9 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$ 92 including taxes and charges.

      • SEA22:08
        11h 1m
        1 stop
        DCA12:09
        Wed, Dec 4|Seattle - Washington D.C.|Frontier Airlines
        S$ 93
        S$ 93

        Fly from Seattle to Washington D.C. on Wed, Dec 4 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$ 93 including taxes and charges.

      • SEA15:15
        17h 46m
        1 stop
        DCA12:01
        Mon, Jan 13|Seattle - Washington D.C.|Frontier Airlines
        S$ 93
        S$ 93

        Fly from Seattle to Washington D.C. on Mon, Jan 13 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$ 93 including taxes and charges.

      • SEA15:15
        17h 46m
        1 stop
        DCA12:01
        Thu, Jan 9|Seattle - Washington D.C.|Frontier Airlines
        S$ 93
        S$ 93

        Fly from Seattle to Washington D.C. on Thu, Jan 9 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$ 93 including taxes and charges.

      • SEA15:15
        17h 51m
        1 stop
        DCA12:06
        Mon, Jan 27|Seattle - Washington D.C.|Frontier Airlines
        S$ 95
        S$ 95

        Fly from Seattle to Washington D.C. on Mon, Jan 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$ 95 including taxes and charges.

      • SEA15:15
        17h 51m
        1 stop
        DCA12:06
        Thu, Jan 30|Seattle - Washington D.C.|Frontier Airlines
        S$ 96
        S$ 96

        Fly from Seattle to Washington D.C. on Thu, Jan 30 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.

      • SEA13:00
        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.

Cheapest time to fly 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 lowest average weekly prices of the corresponding route on Trip.com.

Cheapest Airlines flying from Seattle to Washington D.C.

We have a range of prices from different airlines providing flights from Seattle to Washington D.C.. Check below for the journey which best suits your travel needs.

Frontier Airlines
From S$ 91
Alaska Airlines
From S$ 125
Delta Air Lines
From S$ 153
American Airlines
From S$ 157
United Airlines
From S$ 168
Sun Country Airlines
From S$ 186
Southwest Airlines
From S$ 200
Jetblue Airways
From S$ 201
Spirit Airlines
From S$ 1,003

Find more flights and airlines

Alternative Routes from Seattle to Washington D.C.

Searching for potential routes that might be cheaper and faster? There are a few alternative ways to get to Washington D.C. from Seattle which could help you save money and time.

  • 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
    S$ 91
  • Alaska Airlines
    SEA
    09:54
    5h 3m
    Nonstop
    IAD
    17:57
    Seattle-Tacoma International Airport - Dulles International Airport
    Wed, Jan 8Alaska Airlines
    S$ 144
  • Alaska Airlines
    SEA
    09:54
    5h 3m
    Nonstop
    IAD
    17:57
    Seattle-Tacoma International Airport - Dulles International Airport
    Wed, Jan 8Alaska Airlines
    S$ 144
    Find More Flights

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$ 398.

  • How long is a flight 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 16:03.

  • 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.

Understanding the common pitfalls when booking your flight tickets can help you save massively when it comes time to fly. We’ve listed our six essential steps to keep in mind when you’re booking flight tickets to help you find the best price.
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$ 91
Cheapest return ticket priceS$ 247
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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