$99 Cheap Flights from Seattle (SEA) to Washington (WAS)

View $99 flight on Wed, Dec 17, 2025Opens in a new window

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

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Cheap Flights from Seattle to Washington (SEA-WAS)

Prices were available within the past 7 days and start at $99 for one-way flights and $201 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Mon, Oct 27 - Tue, Oct 28
SEA
Seattle
BWI
Baltimore
$201 Roundtrip, found 11 hours ago
$201
Roundtrip
found 11 hours ago
Select Delta flight, departing Mon, Oct 27 from Seattle to Baltimore, returning Tue, Oct 28, priced at $201 found 11 hours ago
United
Sat, Dec 6 - Mon, Dec 8
SEA
Seattle
BWI
Baltimore
$204 Roundtrip, found 12 hours ago
$204
Roundtrip
found 12 hours ago
Select United flight, departing Sat, Dec 6 from Seattle to Baltimore, returning Mon, Dec 8, priced at $204 found 12 hours ago
American Airlines
Wed, Oct 15 - Wed, Oct 22
SEA
Seattle
BWI
Baltimore
$207 Roundtrip, just found
$207
Roundtrip
just found
Select American Airlines flight, departing Wed, Oct 15 from Seattle to Baltimore, returning Wed, Oct 22, priced at $207 just found
American Airlines
Wed, Oct 15 - Wed, Oct 22
SEA
Seattle
BWI
Baltimore
$208 Roundtrip, just found
$208
Roundtrip
just found
Select American Airlines flight, departing Wed, Oct 15 from Seattle to Baltimore, returning Wed, Oct 22, priced at $208 just found
Delta
Sat, Sep 20 - Sat, Oct 4
SEA
Seattle
BWI
Baltimore
$210 Roundtrip, just found
$210
Roundtrip
just found
Select Delta flight, departing Sat, Sep 20 from Seattle to Baltimore, returning Sat, Oct 4, priced at $210 just found
Southwest Airlines
Wed, Sep 17 - Mon, Sep 22
SEA
Seattle
BWI
Baltimore
$232 Roundtrip, found 1 hour ago
$232
Roundtrip
found 1 hour ago
Select Southwest Airlines flight, departing Wed, Sep 17 from Seattle to Baltimore, returning Mon, Sep 22, priced at $232 found 1 hour ago
Delta
Sat, Sep 20 - Sat, Oct 4
SEA
Seattle
BWI
Baltimore
$233 Roundtrip, just found
$233
Roundtrip
just found
Select Delta flight, departing Sat, Sep 20 from Seattle to Baltimore, returning Sat, Oct 4, priced at $233 just found
Alaska Airlines
Wed, Oct 15 - Wed, Oct 22
SEA
Seattle
BWI
Baltimore
$234 Roundtrip, just found
$234
Roundtrip
just found
Select Alaska Airlines flight, departing Wed, Oct 15 from Seattle to Baltimore, returning Wed, Oct 22, priced at $234 just found
Delta
Tue, Oct 28 - Sat, Nov 1
SEA
Seattle
BWI
Baltimore
$235 Roundtrip, just found
$235
Roundtrip
just found
Select Delta flight, departing Tue, Oct 28 from Seattle to Baltimore, returning Sat, Nov 1, priced at $235 just found
Delta
Sat, Sep 20 - Sat, Oct 4
SEA
Seattle
BWI
Baltimore
$236 Roundtrip, just found
$236
Roundtrip
just found
Select Delta flight, departing Sat, Sep 20 from Seattle to Baltimore, returning Sat, Oct 4, priced at $236 just found

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

September is typically the cheapest month to fly

From $138 - $268 per traveler.

Graph displaying average flight prices per month

Alternative airports near Washington

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Ronald Reagan Washington National DCA. Cheapest and Closest option available. Average driving time to city center is 8 minutes. Flights from $348
DCA
Ronald Reagan Washington National
CheapestClosest
Average driving time to city center8 min
Flights from $348
Select flight to Baltimore Washington Intl. Thurgood Marshall BWI. Cheapest option available. Average driving time to city center is 40 minutes. Flights from $348
BWI
Baltimore Washington Intl. Thurgood Marshall
Cheapest
Average driving time to city center40 min
Flights from $348
Select flight to Washington Dulles Intl. IAD. Average driving time to city center is 36 minutes. Flights from $514
IAD
Washington Dulles Intl.
Average driving time to city center36 min
Flights from $514
Flights from Seattle (SEA) to Baltimore (BWI)
Origin airport
Seattle - Tacoma Intl.
Destination airport
Baltimore Washington Intl. Thurgood Marshall
Roundtrip price
$201
Distance
2328 mi

Seattle to Washington Flights

The cheapest times to fly from Seattle to Washington

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Seattle to Washington are during the month of October. You can find some of the cheapest flights from Seattle to Washington with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Seattle to Washington

Sunday is one of the best days to book for cheap flights from Seattle to Washington: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Seattle to Washington

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Seattle to Washington in 2025. You can also book with separate airlines for your outbound and return journeys, from $99 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Seattle to Washington flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Seattle to Washington airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

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 $201. 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 vacation, 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 2300 mi. 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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*Available to One Key members.