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Flights from Seattle to Washington D.C.
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Find Seattle to Washington D.C. flights starting at CAD 149.

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

  • One way
  • Round-trip
      • Cheapest nonstop
        SEA09:54
        5h 3m
        Nonstop
        IAD17:57
        Wed, Jan 8|Seattle - Washington D.C.|Alaska Airlines
        CAD 149CAD 306
        51% OFF
        51% OFF
        CAD 306CAD 149

        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 Dulles International Airport. One-way Prices start from CAD 149 including taxes and charges.

      • SEA21:39
        5h 1m
        Nonstop
        IAD05:40
        Wed, Dec 25|Seattle - Washington D.C.|Alaska Airlines
        CAD 154CAD 306
        50% OFF
        50% OFF
        CAD 306CAD 154

        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 Dulles International Airport. One-way Prices start from CAD 154 including taxes and charges.

      • SEA15:15
        17h 51m
        1 stop
        DCA12:06
        Thu, Jan 23|Seattle - Washington D.C.|Frontier Airlines
        CAD 95CAD 306
        69% OFF
        69% OFF
        CAD 306CAD 95

        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 CAD 95 including taxes and charges.

      • SEA15:15
        17h 51m
        1 stop
        DCA12:06
        Mon, Feb 3|Seattle - Washington D.C.|Frontier Airlines
        CAD 95
        CAD 95

        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 CAD 95 including taxes and charges.

      • SEA22:08
        11h 1m
        1 stop
        DCA12:09
        Mon, Dec 9|Seattle - Washington D.C.|Frontier Airlines
        CAD 96
        CAD 96

        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 CAD 96 including taxes and charges.

      • SEA22:08
        11h 1m
        1 stop
        DCA12:09
        Wed, Dec 4|Seattle - Washington D.C.|Frontier Airlines
        CAD 96
        CAD 96

        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 CAD 96 including taxes and charges.

      • SEA15:15
        17h 46m
        1 stop
        DCA12:01
        Mon, Jan 13|Seattle - Washington D.C.|Frontier Airlines
        CAD 96
        CAD 96

        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 CAD 96 including taxes and charges.

      • SEA15:15
        17h 46m
        1 stop
        DCA12:01
        Thu, Jan 9|Seattle - Washington D.C.|Frontier Airlines
        CAD 97
        CAD 97

        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 CAD 97 including taxes and charges.

      • SEA15:15
        17h 51m
        1 stop
        DCA12:06
        Mon, Jan 27|Seattle - Washington D.C.|Frontier Airlines
        CAD 99
        CAD 99

        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 CAD 99 including taxes and charges.

      • SEA15:15
        17h 51m
        1 stop
        DCA12:06
        Thu, Jan 30|Seattle - Washington D.C.|Frontier Airlines
        CAD 100
        CAD 100

        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 CAD 100 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.

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 Cheapest Airlines Flying 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 CAD 95
Alaska Airlines
From CAD 130
Delta Air Lines
From CAD 159
American Airlines
From CAD 163
United Airlines
From CAD 175
Sun Country Airlines
From CAD 193
Southwest Airlines
From CAD 208
Jetblue Airways
From CAD 209
Spirit Airlines
From CAD 1,043

Find more flights and airlines

Alternative Routes for Seattle to Washington D.C. Flights

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
    15:15
    17h 51m
    1 transfer
    DCA
    12:06
    Seattle-Tacoma International Airport - Ronald Reagan Washington National Airport
    Mon, Feb 3Frontier Airlines
    CAD 95
  • Alaska Airlines
    SEA
    09:54
    5h 3m
    Nonstop
    IAD
    17:57
    Seattle-Tacoma International Airport - Dulles International Airport
    Wed, Jan 8Alaska Airlines
    CAD 149
  • Alaska Airlines
    SEA
    09:54
    5h 3m
    Nonstop
    IAD
    17:57
    Seattle-Tacoma International Airport - Dulles International Airport
    Wed, Jan 8Alaska Airlines
    CAD 149
    Find More Flights

FAQ

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

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 Seattle to Washington D.C.. 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

Flight Information for Seattle to Washington D.C. Flights

Cheapest direct flight priceCAD 95
Cheapest return ticket priceCAD 256
Off-season travel monthNovember
Peak season for travelAugust
Flight distance3,736.07km
Average flight time5 hours 8 minutes
Popular airlineAmerican Airlines

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