Alaska Airlines Flights from Saint Louis to Seattle
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1 Passenger
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Lowest fares from Saint Louis to Seattle
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One-way low-fare flights Saint Louis to Seattle.*
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From | To | Fare Type | Dates | Price | |
|---|---|---|---|---|---|
| Saint Louis (STL) | Seattle (SEA) | One-way | Saver | Depart: Jan 31, 2026 | From $109 Seen: 20 hours ago | |
| Saint Louis (STL) | Seattle (SEA) | One-way | Saver | Depart: Feb 4, 2026 | From $109 Seen: 20 hours ago | |
| Saint Louis (STL) | Seattle (SEA) | One-way | Saver | Depart: Mar 3, 2026 | From $109 Seen: 20 hours ago | |
| Saint Louis (STL) | Seattle (SEA) | One-way | Saver | Depart: Jan 21, 2026 | From $109 Seen: 20 hours ago | |
| Saint Louis (STL) | Seattle (SEA) | One-way | Saver | Depart: Jan 13, 2026 | From $109 Seen: 20 hours ago | |
| Saint Louis (STL) | Seattle (SEA) | One-way | Saver | Depart: Feb 11, 2026 | From $109 Seen: 20 hours ago | |
| Saint Louis (STL) | Seattle (SEA) | One-way | Saver | Depart: Mar 7, 2026 | From $109 Seen: 20 hours ago | |
| Saint Louis (STL) | Seattle (SEA) | One-way | Saver | Depart: Jan 28, 2026 | From $109 Seen: 20 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.