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Washington D.C. to Seattle - Flights Starting at US$98

Book one-way or return flights from Washington D.C. to Seattle from as little as US$98. Choose from the popular airlines below and book your flight today!

  • One way
  • Round-trip

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

We've found these cheap flights for you. You may book a one-way or round trip as per your needs.

We monitor flight fares to help you seize the best deals effortlessly

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

View airlines operating flights from Washington D.C. to Seattle. Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.

Frontier Airlines
From US$98
Sun Country Airlines
From US$112
Delta Air Lines
From US$138
American Airlines
From US$141
Southern Airways Express
From US$194
Jetblue Airways
From US$202
United Airlines
From US$232
Southwest Airlines
From US$256
Alaska Airlines
From US$317
ANA airlines

Find more flights and airlines

Alternative Routes from Washington D.C. to Seattle

Discover different routes, airlines, and transfers and find the best alternative flights for your journey from Washington D.C. to Seattle.

  • Cheapest
    Frontier Airlines
    DCA
    18:59
    16h 40m
    1 transfer
    SEA
    08:39
    Ronald Reagan Washington National Airport - Seattle-Tacoma International Airport
    Mon, Jun 10Frontier Airlines
    US$98
  • Sun Country Airlines
    IAD
    12:05
    21h 56m
    2 transfer
    SEA
    07:01
    Dulles International Airport - Seattle-Tacoma International Airport
    Tue, Jun 4Sun Country Airlines
    US$112
  • Sun Country Airlines
    IAD
    12:05
    21h 56m
    2 transfer
    SEA
    07:01
    Dulles International Airport - Seattle-Tacoma International Airport
    Tue, Jun 4Sun Country Airlines
    US$112
    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 $446.
  • How long does it take to fly from Washington D.C. (WAS) to Seattle (SEA) and what is the distance?

    It takes around 5 hours 45 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

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from Washington D.C. to Seattle. Book your flights at the right time and save more.
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

$97

Cheapest round-trip ticket price

$218

Off-season for travel

January

Peak season for travel

November

Flight distance

3,736.07km

Average flight time

5 hours 45 minutes

Popular airline

Alaska Airlines