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Flights from Washington D.C. to Seattle
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Find cheap one-way flights from Washington D.C. to Seattle starting at US$56.

For as little as US$56, you can take your next adventure to Seattle without breaking the bank. Choose between one-way and return tickets from Washington D.C. below.

  • One way
  • Round-trip
      • DCA18:59
        16h 38m
        1 stop
        SEA08:37
        Sat, Sep 7|Washington D.C. - Seattle|Frontier Airlines
        US$56US$118
        53% OFF
        53% OFF
        US$118US$56
      • DCA18:59
        16h 38m
        1 stop
        SEA08:37
        Tue, Sep 17|Washington D.C. - Seattle|Frontier Airlines
        US$67US$118
        44% OFF
        44% OFF
        US$118US$67
      • DCA18:59
        15h 5m
        1 stop
        SEA07:04
        Tue, Aug 20|Washington D.C. - Seattle|Frontier Airlines
        US$72US$118
        39% OFF
        39% OFF
        US$118US$72
      • DCA18:59
        15h 5m
        1 stop
        SEA07:04
        Tue, Sep 3|Washington D.C. - Seattle|Frontier Airlines
        US$74
        US$74
      • DCA18:59
        16h 38m
        1 stop
        SEA08:37
        Sun, Sep 1|Washington D.C. - Seattle|Frontier Airlines
        US$74
        US$74
      • DCA07:00
        11h 15m
        1 stop
        SEA15:15
        Wed, Sep 4|Washington D.C. - Seattle|Frontier Airlines
        US$76
        US$76
      • DCA12:59
        21h 25m
        1 stop
        SEA07:24
        Wed, Aug 21|Washington D.C. - Seattle|Frontier Airlines
        US$83
        US$83
      • DCA18:59
        16h 2m
        1 stop
        SEA08:01
        Sat, Sep 14|Washington D.C. - Seattle|Frontier Airlines
        US$83
        US$83
      • DCA12:59
        11h
        1 stop
        SEA20:59
        Mon, Aug 19|Washington D.C. - Seattle|Frontier Airlines
        US$83
        US$83
      • DCA12:59
        22h 38m
        1 stop
        SEA08:37
        Mon, Aug 26|Washington D.C. - Seattle|Frontier Airlines
        US$86
        US$86
      • WAS13:00
        3h 5m
        Direct
        SEA14:00
        Sat, Aug 3|Washington D.C. - Seattle|Frontier Airlines
        Find More Flights
        Find More Flights

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

When is the cheapest time to book flights from Washington D.C. to Seattle?

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 Seattle from Washington D.C. have changed and are set to move below.

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.
Cheapest airlines flights from Washington D.C. to Seattle

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

Frontier Airlines
From US$56
United Airlines
From US$116
Alaska Airlines
From US$121
Delta Air Lines
From US$121
Jetblue Airways
From US$124
Sun Country Airlines
From US$136
American Airlines
From US$137
Southwest Airlines
From US$193
ANA airlines

Find more flights and airlines

Find cheap flights from Washington D.C. to Seattle by different airports

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

  • Cheapest
    Frontier Airlines
    DCA
    18:59
    16h 38m
    1 transfer
    SEA
    08:37
    Ronald Reagan Washington National Airport - Seattle-Tacoma International Airport
    Sat, Sep 7Frontier Airlines
    US$56
  • United Airlines
    IAD
    22:10
    13h 24m
    1 transfer
    SEA
    08:34
    Dulles International Airport - Seattle-Tacoma International Airport
    Wed, Sep 4United Airlines
    US$116
  • United Airlines
    IAD
    22:10
    13h 24m
    1 transfer
    SEA
    08:34
    Dulles International Airport - Seattle-Tacoma International Airport
    Wed, Sep 4United Airlines
    US$116
    Find More Flights

Frequently Asked Questions

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

    Airlines adjust prices for flights from Washington D.C. to Seattle based on the departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.

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

    According to Trip.com's data, the lowest price is around $439.

  • How long does it take to fly from Washington D.C. (WAS) to Seattle (SEA) and what is the distance?

    It takes around 6 hours 19 minutes to fly from Washington D.C. (WAS) to Seattle (SEA).

  • What is the transportation method from the main airport to downtown in Seattle?

    • The distance from Seattle-Tacoma International Airport to downtown is about 17km. It takes about 30 minutes by taxi.

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

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

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

Washington D.C. to Seattle Flight Information

Cheapest nonstop flight price

$55

Cheapest round-trip ticket price

$174

Off-season for travel

September

Peak season for travel

January

Flight distance

3,736.07km

Average flight time

6 hours 19 minutes

Popular airline

Alaska Airlines

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