Alaska Airlines Flights from Boston to Seattle

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Lowest fares from Boston to Seattle

Jun 2025
From$169*
Seen: 5 hours ago
Flight Type One Way|Saver
$154
$732
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Range$154-$732

*Displayed prices have been available within the past 24 hours and may not be available at the time of booking. Fares listed may be Saver fares, which is our most restrictive fare option and subject to additional restrictions. For roundtrip journeys, the price displayed—available within the past 24 hours—is the aggregate of the lowest available fare each way. Additional baggage charges and fees for optional products and services may apply. Other terms and conditions may apply.

One-way low-fare flights Boston to Seattle.*

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One-way low-fare flights Boston to Seattle.*
From
To
Fare Type
Dates
Price
Boston (BOS)Seattle (SEA)One-way
|
Saver		Depart: Sep 6, 2025

From

$109

Seen: 8 hours ago

Boston (BOS)Seattle (SEA)One-way
|
Saver		Depart: Oct 21, 2025

From

$109

Seen: 7 hours ago

Boston (BOS)Seattle (SEA)One-way
|
Saver		Depart: Sep 3, 2025

From

$109

Seen: 4 hours ago

Boston (BOS)Seattle (SEA)One-way
|
Saver		Depart: Oct 11, 2025

From

$109

Seen: 1 day ago

Boston (BOS)Seattle (SEA)One-way
|
Saver		Depart: Sep 17, 2025

From

$109

Seen: 1 day ago

Boston (BOS)Seattle (SEA)One-way
|
Saver		Depart: Sep 20, 2025

From

$109

Seen: 1 day ago

Boston (BOS)Seattle (SEA)One-way
|
Saver		Depart: Sep 13, 2025

From

$109

Seen: 3 hours ago

Boston (BOS)Seattle (SEA)One-way
|
Saver		Depart: Oct 4, 2025

From

$109

Seen: 1 hour ago

*Displayed prices have been available within the past 24 hours and may not be available at the time of booking. Fares listed may be Saver fares, which is our most restrictive fare option and subject to additional restrictions. For roundtrip journeys, the price displayed—available within the past 24 hours—is the aggregate of the lowest available fare each way. Additional baggage charges and fees for optional products and services may apply. Other terms and conditions may apply.

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