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Flights from Seattle to Washington D.C. Starting at $70

We've found these cheap flights for you. You can book one-way or round-trip flight tickets.

  • One way
  • Round-trip

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

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

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

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

Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.

Frontier Airlines
From $60
Alaska Airlines
From $96
Delta Air Lines
From $107
Sun Country Airlines
From $116
Spirit Airlines
From $148
United Airlines
From $161
Jetblue Airways
From $188
American Airlines
From $239
Southwest Airlines
From $340
ANA airlines

Find more flights and airlines

Alternative Cheap Routes from Seattle to Washington D.C.

Searching for potential routes that might be cheaper and faster? Check out these alternative flights from Seattle to Washington D.C..

  • Cheapest
    Frontier Airlines
    SEA
    22:34
    10h 26m
    1 transfer
    DCA
    12:00
    Seattle-Tacoma International Airport - Ronald Reagan Washington National Airport
    Fri, Apr 26Frontier Airlines
    $60
  • Sun Country Airlines
    SEA
    23:45
    8h 7m
    1 transfer
    IAD
    10:52
    Seattle-Tacoma International Airport - Dulles International Airport
    Sun, Apr 28Sun Country Airlines
    $116
  • Sun Country Airlines
    SEA
    23:45
    8h 7m
    1 transfer
    IAD
    10:52
    Seattle-Tacoma International Airport - Dulles International Airport
    Sun, Apr 28Sun Country Airlines
    $116
    Find More Flights

Frequently Asked Questions

  • When are 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 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 Seattle (SEA) to Washington D.C. (WAS) cost?

    According to Trip.com's data, the lowest price is around $429.
  • How long does it take to fly from Seattle (SEA) to Washington D.C. (WAS) and what is the distance?

    It takes around 5 hours 42 minutes to fly from Seattle (SEA) to Washington D.C. (WAS).
  • What are the most popular airlines that fly from Seattle (SEA) to Washington D.C. (WAS)?

Travel Info | Seattle to Washington D.C.

Cheapest nonstop flight price

$59

Cheapest round-trip ticket price

$200

Off-season for travel

December

Peak season for travel

September