S$189 Cheap Flights from Baltimore to Seattle

View S$189 flight on Mon, 11 Aug, 2025Opens in a new window

Popular airlines from Baltimore Washington Intl. Airport (BWI) to Seattle-Tacoma International Airport (SEA)

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Cheap Flights from Baltimore to Seattle (BWI-SEA)

Prices were available within the past 7 days and start at S$189 for one-way flights and S$354 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, 23 Aug - Sat, 30 Aug
BWI
Baltimore
SEA
Seattle
S$354 Return, found 6 days ago
S$354
Return
found 6 days ago
Select Delta flight, departing Sat, 23 Aug from Baltimore to Seattle, returning Sat, 30 Aug, priced at S$354 found 6 days ago
Delta
Wed, 27 Aug - Wed, 3 Sep
BWI
Baltimore
SEA
Seattle
S$387 Return, found 2 days ago
S$387
Return
found 2 days ago
Select Delta flight, departing Wed, 27 Aug from Baltimore to Seattle, returning Wed, 3 Sep, priced at S$387 found 2 days ago
United
Sat, 23 Aug - Sat, 30 Aug
BWI
Baltimore
SEA
Seattle
S$417 Return, found 6 days ago
S$417
Return
found 6 days ago
Select United flight, departing Sat, 23 Aug from Baltimore to Seattle, returning Sat, 30 Aug, priced at S$417 found 6 days ago
Delta
Sun, 17 Aug - Tue, 26 Aug
BWI
Baltimore
SEA
Seattle
S$434 Return, found 2 days ago
S$434
Return
found 2 days ago
Select Delta flight, departing Sun, 17 Aug from Baltimore to Seattle, returning Tue, 26 Aug, priced at S$434 found 2 days ago
Delta
Sun, 17 Aug - Tue, 26 Aug
BWI
Baltimore
SEA
Seattle
S$440 Return, found 2 days ago
S$440
Return
found 2 days ago
Select Delta flight, departing Sun, 17 Aug from Baltimore to Seattle, returning Tue, 26 Aug, priced at S$440 found 2 days ago
United
Sun, 17 Aug - Tue, 26 Aug
BWI
Baltimore
SEA
Seattle
S$446 Return, found 2 days ago
S$446
Return
found 2 days ago
Select United flight, departing Sun, 17 Aug from Baltimore to Seattle, returning Tue, 26 Aug, priced at S$446 found 2 days ago
American Airlines
Sun, 17 Aug - Tue, 26 Aug
BWI
Baltimore
SEA
Seattle
S$451 Return, found 2 days ago
S$451
Return
found 2 days ago
Select American Airlines flight, departing Sun, 17 Aug from Baltimore to Seattle, returning Tue, 26 Aug, priced at S$451 found 2 days ago
United
Sun, 17 Aug - Tue, 26 Aug
BWI
Baltimore
SEA
Seattle
S$452 Return, found 2 days ago
S$452
Return
found 2 days ago
Select United flight, departing Sun, 17 Aug from Baltimore to Seattle, returning Tue, 26 Aug, priced at S$452 found 2 days ago
American Airlines
Sun, 17 Aug - Tue, 26 Aug
BWI
Baltimore
SEA
Seattle
S$457 Return, found 2 days ago
S$457
Return
found 2 days ago
Select American Airlines flight, departing Sun, 17 Aug from Baltimore to Seattle, returning Tue, 26 Aug, priced at S$457 found 2 days ago
Delta
Sat, 23 Aug - Sat, 30 Aug
BWI
Baltimore
SEA
Seattle
S$459 Return, found 6 days ago
S$459
Return
found 6 days ago
Select Delta flight, departing Sat, 23 Aug from Baltimore to Seattle, returning Sat, 30 Aug, priced at S$459 found 6 days ago

Find the cheapest month to fly from Baltimore (BWI) to Seattle (SEA)

September is typically the cheapest month to fly

From S$192 - S$305 per traveller.

Graph displaying average flight prices per month

Baltimore to Seattle route information
Origin airport
Baltimore Washington Intl. Thurgood Marshall
Destination airport
Seattle - Tacoma Intl.
Return price
S$354
Distance
3725 km
Average flight time
3 hours 6 mins

Flights from Baltimore to Seattle

There are several airlines that operate frequent flights from Washington D.C. (BWI) to Seattle (SEA) including

The earliest flight leaves Baltimore Washington Intl. Thurgood Marshall Airport at 07:20 and arrives at Seattle Tacoma Intl. Airport at 10:00. The last flight of the day departs Washington D.C. at 18:40 and arrives at Seattle at 21:41.

The flight distance from Washington D.C. to Seattle is about 3768 km, the shortest flight is 05 hours 40 minutes with .

Expedia lets you search across the largest number of airlines and Seattle flights, which means that you’ll be able to find a great flight deal at the perfect travel date and time. Our simple-to-use booking engine makes looking for terrific bargains easy and hassle-free; just enter your travel dates and departure city, and let Expedia do the rest! Adjust your travel dates and explore connecting flights to find an even better deal on your Baltimore Seattle flight!

Browse through dozens of options and rest assured that you’re seeing the best price guaranteed! Our friendly customer service representatives are here to serve you 24 hours day to provide assistance and answer any questions that you may have about booking your Baltimore to Seattle trip. There’s simply no substitute for great prices suited to your travel needs and backed by excellent customer support.

Combine your Seattle flight with a hotel and/or car rental for a package deal designed to save you even more money! Discover additional savings by booking in advance or find a last minute deal. There are tons of ways to save on your flights from Baltimore to Seattle with Expedia. Use us as your stop travel destination and have the confidence that you’re getting a bargain!

Frequently asked questions

How much is a flight from BWI Airport to Sea-Tac Airport?
Within the past 7 days on Expedia, for flights departing within the next year, the lowest price advertised for a round-trip journey from BWI to Sea-Tac Airport was S$354. Fares this good don't stick around for long, so make sure you book yours today. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from BWI Marshall to Sea-Tac Airport?
The majority of flights can be conveniently cancelled online, but whether or not you are charged a fee varies between airlines. If you do need to cancel your trip, follow the easy instructions in the Customer Service Portal.
How do I find cheap flights from BWI Airport to SEA 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 BWI Airport to Seattle - Tacoma Intl. Airport (SEA) flights, you'll see a "no change fees" filter for you to select.
How far is the flight from BWI Airport to Seattle - Tacoma Intl. Airport (SEA)?
The flight distance between BWI Marshall and Sea-Tac Airport is 3,800 kilometres. Pack yourself a drink, some snacks and a few good podcasts. Keep yourself entertained and the hours will fly by.
Which airlines fly direct from BWI Marshall to SEA?
Flying straight from BWI Airport to Sea-Tac Airport is a cinch with Alaska Airlines (AS). This top airline operates 30 flights every month.
Are BWI Marshall to Seattle - Tacoma Intl. Airport (SEA) flight tickets cheaper when they're purchased at the last minute?
Booking your trip from BWI to Seattle - Tacoma Intl. Airport (SEA) at the last minute could be your ticket to an awesome deal. However, it might cost you a whole lot more! If you'd prefer to err on the side of caution, book well ahead of your departure date. In fact, Expedia has some of the biggest bargains up to a year in advance. If your preferred carrier hasn't released tickets yet, check back regularly as deals are updated on Expedia all the time.

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