Alaska Airlines Flight AS378 Deals & Information (2025/2026)

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Alaska Airlines Flight 378 Route Deals From $129

The cheapest prices found with in the last 7 days for return flights were $222 and $129 for one-way flights to Baltimore Washington Intl. Thurgood Marshall for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Feb 4 - Sun, Feb 8
SEA
Seattle - Tacoma Intl.
BWI
Baltimore Washington Intl. Thurgood Marshall
$222 Roundtrip, found 1 day ago
$222
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Wed, Feb 4 from Seattle - Tacoma Intl. to Baltimore Washington Intl. Thurgood Marshall, returning Sun, Feb 8, priced at $222 found 1 day ago
Sat, Nov 8 - Tue, Nov 11
SEA
Seattle - Tacoma Intl.
BWI
Baltimore Washington Intl. Thurgood Marshall
$242 Roundtrip, found 23 hours ago
$242
Roundtrip
found 23 hours ago
Select Alaska Airlines flight, departing Sat, Nov 8 from Seattle - Tacoma Intl. to Baltimore Washington Intl. Thurgood Marshall, returning Tue, Nov 11, priced at $242 found 23 hours ago

Frequently asked questions

What route does flight number AS378 take?
You'll be landing at Seattle - Tacoma Intl. Airport (SEA) from OGG if you're traveling on flight number AS378. You'll be in the air for 5 hours and 32 minutes during this trip. It's also worthwhile noting that the flight conveniently travels direct.
What kind of plane is on flight number AS378?
You'll most likely find yourself jumping on board the Boeing 737-900 if your flight number is AS378. This flight almost always jets off from OGG and touches down at SEA.
If I am not able to travel due to COVID-19, can I change my flight to a later date?
For more info about changing your AS378 flight with Travelocity, please visit our Customer Service Portal.