Alaska Airlines Flights from Saint Louis to Seattle

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Lowest fares from Saint Louis to Seattle

*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 Saint Louis to Seattle.*

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One-way low-fare flights Saint Louis to Seattle.*
From
To
Fare Type
Dates
Price
Saint Louis (STL)Seattle (SEA)One-way
|
Saver		Depart: Nov 19, 2025

From

$129

Seen: 1 day ago

Saint Louis (STL)Seattle (SEA)One-way
|
Saver		Depart: Sep 27, 2025

From

$129

Seen: 11 hours ago

Saint Louis (STL)Seattle (SEA)One-way
|
Saver		Depart: Oct 1, 2025

From

$129

Seen: 11 hours ago

Saint Louis (STL)Seattle (SEA)One-way
|
Saver		Depart: Oct 15, 2025

From

$129

Seen: 11 hours ago

Saint Louis (STL)Seattle (SEA)One-way
|
Saver		Depart: Nov 1, 2025

From

$129

Seen: 11 hours ago

Saint Louis (STL)Seattle (SEA)One-way
|
Saver		Depart: Nov 8, 2025

From

$129

Seen: 11 hours ago

Saint Louis (STL)Seattle (SEA)One-way
|
Saver		Depart: Nov 12, 2025

From

$129

Seen: 11 hours ago

Saint Louis (STL)Seattle (SEA)One-way
|
Saver		Depart: Nov 18, 2025

From

$129

Seen: 11 hours 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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