S$ 66 Cheap Flights from Seattle to Washington D.C. (SEA-WAS)

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Cheap Flights from Seattle to Washington D.C. starting at S$ 66

Book one-way or return flights from Seattle to Washington D.C. from as little as S$ 66. 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.

Searching for the best last minute flight from Seattle to Washington D.C.? Find one-way or return flights that are affordable and fit your itinerary.

Trip.com monitors the ticket fares of flights from Seattle to Washington D.C.. Stay updated on price trends and snag the best deals for your upcoming trip.

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.

View airlines operating 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 S$ 66

Sun Country Airlines

From S$ 139

Alaska Airlines

From S$ 145

Delta Air Lines

From S$ 171

United Airlines

From S$ 202

Jetblue Airways

From S$ 219

Southwest Airlines

From S$ 242

American Airlines

From S$ 364

ANA airlines

Find more flights and airlines

Alternative Routes from Seattle to Washington D.C.

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

Cheapest
SEA
17:58
15h 2m
1 transfer
DCA
12:00
Seattle-Tacoma International Airport - Ronald Reagan Washington National Airport
Wed, May 1Frontier Airlines
S$ 66
SEA
16:45
15h 7m
1 transfer
IAD
10:52
Seattle-Tacoma International Airport - Dulles International Airport
Wed, May 1Sun Country Airlines
S$ 139
SEA
16:45
15h 7m
1 transfer
IAD
10:52
Seattle-Tacoma International Airport - Dulles International Airport
Wed, May 1Sun Country Airlines
S$ 139
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$ 525.
How long is a flight from Seattle (SEA) to Washington D.C. (WAS)?
It takes about 5 hours 41 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 08:30 and arrives in Washington D.C. (IAD) at 16:26.
What are the most popular airlines that fly from Seattle (SEA) to Washington D.C. (WAS)?
Airlines with flights from Seattle (SEA) to Washington D.C. (WAS): Brussels Airlines, Air Tahiti Nui, Virgin Atlantic, United Airlines, Scandinavian Airlines, Singapore Airlines, Korean Air, Delta Air Lines, Alaska Airlines, Austrian Airlines, China Eastern Airlines, Japan Airlines, Qatar Airways and Ethiopian Airlines.
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.

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.

Book Early

Once prices are gone, they're gone. Lock in deals while you can!

Compare Flight Prices

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Look Out for Deals

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Check One-way Fares

Buying two cheap one-way flights can sometimes be a better deal than a round-trip.

Try Different Dates

Flying during the week, early in the morning, or late at night can help save money.

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Flight Information from Seattle to Washington D.C.

Cheapest direct flight price	S$ 66
Cheapest return ticket price	S$ 232
Cheapest month	May
Peak season for travel	October
Flight distance	3,736.07km
Average flight time	5 hours 41 minutes
Popular airline	Alaska Airlines