Cheap Flights From Baltimore Washington Intl. Thurgood Marshall (BWI) To Seattle - Tacoma Intl. (SEA)

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Cheapest Flights from Baltimore (BWI) to Seattle (SEA)

The cheapest flights to Seattle - Tacoma Intl. found within the past 7 days were CA $328 round trip and CA $165 one way. Prices and availability subject to change. Additional terms may apply.

Mon, Aug. 18 - Tue, Aug. 26
BWI
Baltimore
SEA
Seattle
CA $328 Roundtrip, found 1 day ago
CA $328
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Mon, Aug. 18 from Baltimore to Seattle, returning Tue, Aug. 26, priced at CA $328 found 1 day ago
Wed, Sep. 24 - Sun, Sep. 28
BWI
Baltimore
SEA
Seattle
CA $352 Roundtrip, found 1 day ago
CA $352
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Wed, Sep. 24 from Baltimore to Seattle, returning Sun, Sep. 28, priced at CA $352 found 1 day ago
Fri, Sep. 12 - Mon, Sep. 15
BWI
Baltimore
SEA
Seattle
CA $379 Roundtrip, found 5 days ago
CA $379
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Fri, Sep. 12 from Baltimore to Seattle, returning Mon, Sep. 15, priced at CA $379 found 5 days ago
Wed, Aug. 13 - Wed, Aug. 20
BWI
Baltimore
SEA
Seattle
CA $399 Roundtrip, found 4 days ago
CA $399
Roundtrip
found 4 days ago
Select Delta flight, departing Wed, Aug. 13 from Baltimore to Seattle, returning Wed, Aug. 20, priced at CA $399 found 4 days ago
Mon, Aug. 18 - Tue, Aug. 26
BWI
Baltimore
SEA
Seattle
CA $408 Roundtrip, found 1 day ago
CA $408
Roundtrip
found 1 day ago
Select Sun Country Airlines flight, departing Mon, Aug. 18 from Baltimore to Seattle, returning Tue, Aug. 26, priced at CA $408 found 1 day ago
Wed, Aug. 13 - Wed, Aug. 20
BWI
Baltimore
SEA
Seattle
CA $412 Roundtrip, found 4 days ago
CA $412
Roundtrip
found 4 days ago
Select American Airlines flight, departing Wed, Aug. 13 from Baltimore to Seattle, returning Wed, Aug. 20, priced at CA $412 found 4 days ago
Wed, Aug. 13 - Wed, Aug. 20
BWI
Baltimore
SEA
Seattle
CA $426 Roundtrip, found 4 days ago
CA $426
Roundtrip
found 4 days ago
Select American Airlines flight, departing Wed, Aug. 13 from Baltimore to Seattle, returning Wed, Aug. 20, priced at CA $426 found 4 days ago
Mon, Aug. 18 - Tue, Aug. 26
BWI
Baltimore
SEA
Seattle
CA $429 Roundtrip, found 1 day ago
CA $429
Roundtrip
found 1 day ago
Select Sun Country Airlines flight, departing Mon, Aug. 18 from Baltimore to Seattle, returning Tue, Aug. 26, priced at CA $429 found 1 day ago
Thu, Oct. 30 - Thu, Nov. 6
BWI
Baltimore
SEA
Seattle
CA $434 Roundtrip, found 4 days ago
CA $434
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Thu, Oct. 30 from Baltimore to Seattle, returning Thu, Nov. 6, priced at CA $434 found 4 days ago
Fri, Oct. 10 - Mon, Oct. 13
BWI
Baltimore
SEA
Seattle
CA $435 Roundtrip, found 1 day ago
CA $435
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Fri, Oct. 10 from Baltimore to Seattle, returning Mon, Oct. 13, priced at CA $435 found 1 day ago

Frequently asked questions

Are there direct flights from BWI to Seattle - Tacoma Intl. Airport (SEA)?
If you'd prefer to avoid layovers, it's smart to arrange your flight from BWI to Sea-Tac Airport well in advance of your departure. Alaska Airlines is the only airline that operates nonstop flights to Seattle from Baltimore.
What airlines fly from BWI Marshall to Seattle - Tacoma Intl. Airport (SEA)?
Hoping to fly directly from BWI Airport to Sea-Tac Airport? It's your lucky day. Alaska Airlines (AS) offers as many as 30 flights every month and is a popular choice with many wise wanderers.
What is the best day to buy a plane ticket?
Airfares offered on Friday tend to be the cheapest, according to flight demand on Travelocity.ca in 2021. Purchasing your airfares on a Thursday or Saturday can also provide better value, however our advice if you're looking to save money is to avoid booking on a Wednesday or Sunday. Our data shows that those two days have the highest ticket values on average, so keep this in mind if you're browsing flight deals.
What are the cheapest days to fly?
Frequent travellers may already know this, but earlier in the week is often the cheapest time to fly. Flights departing on a Monday are the cheapest of the week. Since flights towards the middle of the week tend to be more popular, this causes the prices to rise. This is why, on average, airfares booked on Travelocity.ca in 2021 were most expensive for Wednesday departures.
How far in advance can you book a flight?
Here's the deal: It is typically possible to start comparing international airfares on Travelocity.ca up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 2-4 weeks prior to their travel dates.*According to flight demand on Travelocity.ca from January to December 2021. Savings are subject to change and may vary depending on selections made.
*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.