£97 Cheap Flights from Seattle (SEA) to Washington (WAS)

View £97 flight on Tue, 2 Dec 2025Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Washington

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Cheap Flights from Seattle (SEA) to Washington (WAS)

Prices were available within the past 7 days and start at £97 for one-way flights and £192 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Sat, 30 Aug - Fri, 5 Sep
SEA
Seattle
BWI
Baltimore
£192 Return, found 3 hours ago
£192
Return
found 3 hours ago
Select Alaska Airlines flight, departing Sat, 30 Aug from Seattle to Baltimore, returning Fri, 5 Sep, priced at £192 found 3 hours ago
Alaska Airlines
Tue, 2 Sep - Tue, 9 Sep
SEA
Seattle
IAD
Washington
£205 Return, found 5 days ago
£205
Return
found 5 days ago
Select Alaska Airlines flight, departing Tue, 2 Sep from Seattle to Washington, returning Tue, 9 Sep, priced at £205 found 5 days ago
Alaska Airlines
Sat, 20 Sep - Sat, 4 Oct
SEA
Seattle
DCA
Washington
£205 Return, found 6 days ago
£205
Return
found 6 days ago
Select Alaska Airlines flight, departing Sat, 20 Sep from Seattle to Washington, returning Sat, 4 Oct, priced at £205 found 6 days ago
Alaska Airlines
Thu, 28 Aug - Wed, 3 Sep
SEA
Seattle
DCA
Washington
£207 Return, found 1 day ago
£207
Return
found 1 day ago
Select Alaska Airlines flight, departing Thu, 28 Aug from Seattle to Washington, returning Wed, 3 Sep, priced at £207 found 1 day ago
Alaska Airlines
Sat, 30 Aug - Fri, 5 Sep
SEA
Seattle
IAD
Washington
£208 Return, found 3 hours ago
£208
Return
found 3 hours ago
Select Alaska Airlines flight, departing Sat, 30 Aug from Seattle to Washington, returning Fri, 5 Sep, priced at £208 found 3 hours ago
Alaska Airlines
Fri, 26 Sep - Sat, 27 Sep
SEA
Seattle
IAD
Washington
£214 Return, found 6 days ago
£214
Return
found 6 days ago
Select Alaska Airlines flight, departing Fri, 26 Sep from Seattle to Washington, returning Sat, 27 Sep, priced at £214 found 6 days ago
Delta
Fri, 26 Sep - Sat, 27 Sep
SEA
Seattle
IAD
Washington
£215 Return, found 6 days ago
£215
Return
found 6 days ago
Select Delta flight, departing Fri, 26 Sep from Seattle to Washington, returning Sat, 27 Sep, priced at £215 found 6 days ago
American Airlines
Fri, 26 Sep - Sat, 27 Sep
SEA
Seattle
IAD
Washington
£234 Return, found 6 days ago
£234
Return
found 6 days ago
Select American Airlines flight, departing Fri, 26 Sep from Seattle to Washington, returning Sat, 27 Sep, priced at £234 found 6 days ago
JetBlue Airways
Wed, 13 Aug - Wed, 20 Aug
SEA
Seattle
DCA
Washington
£275 Return, found 5 days ago
£275
Return
found 5 days ago
Select JetBlue Airways flight, departing Wed, 13 Aug from Seattle to Washington, returning Wed, 20 Aug, priced at £275 found 5 days ago
United
Fri, 26 Sep - Sat, 27 Sep
SEA
Seattle
IAD
Washington
£294 Return, found 6 days ago
£294
Return
found 6 days ago
Select United flight, departing Fri, 26 Sep from Seattle to Washington, returning Sat, 27 Sep, priced at £294 found 6 days ago

Find the cheapest month to fly from Seattle (SEA) to Washington (WAS)

September is typically the cheapest month to fly

From £103 - £197 per traveller.

Graph displaying average flight prices per month

Flight from Seattle to Baltimore route information
Origin airport
Seattle - Tacoma Intl.
Destination airport
Baltimore Washington Intl. Thurgood Marshall
Return price
£192
Distance
3725 km

Compare flights from Seattle to Washington easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Seattle to Washington. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to WAS-All Airports in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Seattle - Tacoma Intl. to WAS-All Airports.  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Seattle - Tacoma Intl. (SEA) to WAS-All Airports (WAS)

The easiest way to view the best deals on flights from Seattle to Washington today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Seattle - Tacoma Intl. to WAS-All Airports start at just £192 and range up to £294.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Seattle and Washington
  • booking your flight during August, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Seattle to Washington flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Seattle - Tacoma Intl. to WAS-All Airports for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Frequently asked questions

How much is a flight from Sea-Tac Airport to Washington, DC (WAS-All Airports)?
Based on fares quoted within the last 7 days on Expedia for flights departing within the next year, round-trip flights between SEA and Washington, DC (WAS-All Airports) start from £192. Make your booking today to secure the best price for your exciting adventure. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from SEA to Washington, DC (WAS-All Airports)?
Every airline has its own set of terms and conditions. If you decide to cancel your holiday, head to our Customer Service Portal.
How do I find cheap flights from SEA to Washington, DC (WAS-All Airports) that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Sea-Tac Airport to Washington, DC (WAS-All Airports) flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Seattle - Tacoma Intl. Airport (SEA) to Washington, DC (WAS-All Airports)?
The flying distance between Sea-Tac Airport and Washington, DC (WAS-All Airports) is 3,700 kilometres. Close your eyes or make a start on the latest bestseller and the journey will whiz by.
Which airlines fly direct from SEA to Washington, DC (WAS-All Airports)?
Many adventurers choose to fly with Alaska Airlines (AS) from Sea-Tac Airport to Washington, DC (WAS-All Airports). This top airline offers 117 flights monthly, so you can pick a flight time that's perfect for you. Another carrier operating on this route is United Airlines (UA). You'll have 60 flights each month to choose from.
Are Seattle - Tacoma Intl. Airport (SEA) to Washington, DC (WAS-All Airports) flight tickets cheaper when they're purchased at the last minute?
Booking last minute from Sea-Tac Airport to Washington, DC (WAS-All Airports) can be hit-or-miss. You may be able to score a great bargain, but you could also completely miss out! If you'd rather start planning early on, Expedia compares flight deals up to 12 months in advance. Just keep in mind that not all airlines release their prices so far in advance. Our top tip? Check back often as updates are made frequently.

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