Cheap Flights from Seattle to Washington D.C. from £43️ (SEA-WAS)

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Flights from Seattle to Washington D.C.

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Flights from Seattle to Washington D.C. Starting at £43

Discover our range of affordable one-way and round-trip flights from Seattle to Washington D.C. and kick-start your next adventure today!

One way
Round-trip

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

Find the best time to fly from Seattle to Washington D.C.

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 Washington D.C. from Seattle 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.

Airlines Flying from Seattle to Washington D.C.

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

Frontier Airlines

From £43

Spirit Airlines

From £64

American Airlines

From £92

United Airlines

From £102

Jetblue Airways

From £103

Southwest Airlines

From £138

Alaska Airlines

From £178

Delta Air Lines

From £179

Sun Country Airlines

From £182

ANA airlines

Find more flights and airlines

Alternative Routes from Seattle to Washington D.C.

There are various non-direct routes from Seattle to Washington D.C. which could be cheaper and faster! Check out these alternative options to see if they could work for your trip.

Cheapest
SEA
09:37
9h 22m
1 transfer
DCA
21:59
Seattle-Tacoma International Airport - Ronald Reagan Washington National Airport
Wed, Nov 6Frontier Airlines
£43
SEA
16:11
4h 48m
Direct
IAD
23:59
Seattle-Tacoma International Airport - Dulles International Airport
Wed, Oct 2Alaska Airlines
£178
SEA
16:11
4h 48m
Direct
IAD
23:59
Seattle-Tacoma International Airport - Dulles International Airport
Wed, Oct 2Alaska Airlines
£178
Find More Flights

How do I find the cheapest flights?

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 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 are flights from Seattle (SEA) to Washington D.C. (WAS) cost?
According to Trip.com's data, the lowest price is around £224.
How long is the flight from Seattle (SEA) to Washington D.C. (WAS)?
It takes about 5 hours 10 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)?
Airlines with flights from Seattle (SEA) to Washington D.C. (WAS): Brussels Airlines, Iberia, Virgin Atlantic, All Nippon Airways, Air Tahiti Nui, United Airlines, Alaska Airlines, Singapore Airlines, Korean Air, Austrian Airlines, China Eastern Airlines, Delta Air Lines, 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. (WAS)?
There are 2 airport(s) in Washington D.C. (WAS): Ronald Reagan Washington National Airport and Dulles International Airport.

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

Understanding the common pitfalls when booking your flight tickets can help you save massively when it comes time to fly. We’ve listed our six essential steps to keep in mind when you’re booking flight tickets to help you find the best price.

Book Early

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

Compare Flight Prices

Compare prices on travel agency and airline websites.

Look Out for Deals

Check airline and travel agency websites for latest flight deals

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.

Use the Trip.com App

Save up to £10 per person when booking your flights on Trip.com

Flight Information from Seattle to Washington D.C.

Cheapest direct flight price	£43
Cheapest return ticket price	£134
Off-season travel month	September
Peak season for travel	June
Flight distance	3,736.07km
Average flight time	5 hours 10 minutes
Popular airline	American Airlines