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 $346 round trip and CA $142 one way. Prices and availability subject to change. Additional terms may apply.

Tue, Sep 22 - Tue, Sep 29
BWI
Baltimore
SEA
Seattle
CA $346 Roundtrip, found 1 day ago
CA $346
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Tue, Sep 22 from Baltimore to Seattle, returning Tue, Sep 29, priced at CA $346 found 1 day ago
Mon, Sep 21 - Wed, Sep 30
BWI
Baltimore
SEA
Seattle
CA $406 Roundtrip, found 5 days ago
CA $406
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Mon, Sep 21 from Baltimore to Seattle, returning Wed, Sep 30, priced at CA $406 found 5 days ago
Tue, Sep 22 - Tue, Sep 29
BWI
Baltimore
SEA
Seattle
CA $407 Roundtrip, found 1 day ago
CA $407
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Tue, Sep 22 from Baltimore to Seattle, returning Tue, Sep 29, priced at CA $407 found 1 day ago
Sun, Sep 6 - Tue, Sep 15
BWI
Baltimore
SEA
Seattle
CA $408 Roundtrip, found 2 hours ago
CA $408
Roundtrip
found 2 hours ago
Select Alaska Airlines flight, departing Sun, Sep 6 from Baltimore to Seattle, returning Tue, Sep 15, priced at CA $408 found 2 hours ago
Mon, Sep 21 - Wed, Sep 30
BWI
Baltimore
SEA
Seattle
CA $419 Roundtrip, found 5 days ago
CA $419
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Mon, Sep 21 from Baltimore to Seattle, returning Wed, Sep 30, priced at CA $419 found 5 days ago
Mon, Sep 14 - Wed, Sep 23
BWI
Baltimore
SEA
Seattle
CA $421 Roundtrip, found 4 days ago
CA $421
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Mon, Sep 14 from Baltimore to Seattle, returning Wed, Sep 23, priced at CA $421 found 4 days ago
Sun, Sep 6 - Tue, Sep 15
BWI
Baltimore
SEA
Seattle
CA $422 Roundtrip, found 2 hours ago
CA $422
Roundtrip
found 2 hours ago
Select Alaska Airlines flight, departing Sun, Sep 6 from Baltimore to Seattle, returning Tue, Sep 15, priced at CA $422 found 2 hours ago
Mon, Sep 14 - Wed, Sep 23
BWI
Baltimore
SEA
Seattle
CA $422 Roundtrip, found 4 days ago
CA $422
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Mon, Sep 14 from Baltimore to Seattle, returning Wed, Sep 23, priced at CA $422 found 4 days ago
Wed, Sep 2 - Wed, Sep 9
BWI
Baltimore
SEA
Seattle
CA $429 Roundtrip, found 1 hour ago
CA $429
Roundtrip
found 1 hour ago
Select Alaska Airlines flight, departing Wed, Sep 2 from Baltimore to Seattle, returning Wed, Sep 9, priced at CA $429 found 1 hour ago
Wed, Sep 2 - Wed, Sep 9
BWI
Baltimore
SEA
Seattle
CA $463 Roundtrip, found 1 hour ago
CA $463
Roundtrip
found 1 hour ago
Select Alaska Airlines flight, departing Wed, Sep 2 from Baltimore to Seattle, returning Wed, Sep 9, priced at CA $463 found 1 hour 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.

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*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.