US$78️ Cheap Flights from Washington D.C. to Seattle (2024)

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Washington D.C. to Seattle - Flights Starting at US$78

Book one-way or return flights from Washington D.C. to Seattle from as little as US$78. 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.

American Airlines

From US$96

Alaska Airlines

From US$123

Delta Air Lines

From US$130

Sun Country Airlines

From US$140

Jetblue Airways

From US$145

United Airlines

From US$152

Southwest Airlines

From US$153

Southern Airways Express

From US$177

Frontier Airlines

From US$195

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
IAD
19:09
5h 51m
Direct
SEA
22:00
Dulles International Airport - Seattle-Tacoma International Airport
Wed, May 15Alaska Airlines
US$123
DCA
07:00
27h 20m
1 transfer
SEA
07:20
Ronald Reagan Washington National Airport - Seattle-Tacoma International Airport
Sun, Apr 28Frontier Airlines
US$195
DCA
07:00
27h 20m
1 transfer
SEA
07:20
Ronald Reagan Washington National Airport - Seattle-Tacoma International Airport
Sun, Apr 28Frontier Airlines
US$195
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 $420.
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 49 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)?
Airlines with flights from Washington D.C. (WAS) to Seattle (SEA): Delta Air Lines, Air Tahiti Nui, Korean Air, Singapore Airlines, Alaska Airlines, Brussels Airlines, Qatar Airways, Lufthansa, Austrian Airlines, Ethiopian Airlines, Japan Airlines and Copa Airlines.

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.

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.

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	$77
Cheapest round-trip ticket price	$175
Off-season for travel	January
Peak season for travel	October
Flight distance	3,736.07km
Average flight time	5 hours 49 minutes
Popular airline	Alaska Airlines