Lowest Priced Flights to Saint Louis on Alaska Airlines starting at $109*
Most popular flights to Saint Louis on Alaska Airlines.*
Seattle (SEA)to
Saint Louis (STL)Seattle (SEA)to
Saint Louis (STL)Seattle (SEA)to
Saint Louis (STL)Seattle (SEA)to
Saint Louis (STL)Seattle (SEA)to
Saint Louis (STL)Portland (PDX)to
Saint Louis (STL)Anchorage (ANC)to
Saint Louis (STL)Anchorage (ANC)to
Saint Louis (STL)Puerto Vallarta (PVR)to
Saint Louis (STL)*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.
Top offers for Saint Louis one-way flights.*
From | To | Fare Type | Dates | Price | |
|---|---|---|---|---|---|
| Seattle (SEA) | Saint Louis (STL) | One-way | Saver | Depart: Feb 24, 2026 | From $109 Seen: 7 hours ago | |
| Portland (PDX) | Saint Louis (STL) | One-way | Saver | Depart: May 27, 2026 | From $109 Seen: 7 hours ago | |
| Portland (PDX) | Saint Louis (STL) | One-way | Saver | Depart: May 26, 2026 | From $109 Seen: 7 hours ago | |
| Portland (PDX) | Saint Louis (STL) | One-way | Saver | Depart: Jul 1, 2026 | From $115 Seen: 5 hours ago | |
| Seattle (SEA) | Saint Louis (STL) | One-way | Saver | Depart: Dec 25, 2025 | From $119 Seen: 10 hours ago | |
| Seattle (SEA) | Saint Louis (STL) | One-way | Saver | Depart: Feb 19, 2026 | From $119 Seen: 10 hours ago | |
| Seattle (SEA) | Saint Louis (STL) | One-way | Saver | Depart: Jan 29, 2026 | From $119 Seen: 2 hours ago | |
| Seattle (SEA) | Saint Louis (STL) | One-way | Saver | Depart: Jun 30, 2026 | From $155 Seen: 12 hours ago | |
| Seattle (SEA) | Saint Louis (STL) | One-way | Saver | Depart: May 29, 2026 | From $155 Seen: 5 hours ago | |
| Portland (PDX) | Saint Louis (STL) | One-way | Saver | Depart: Mar 15, 2026 | From $168 Seen: 2 hours ago | |
| Portland (PDX) | Saint Louis (STL) | One-way | Saver | Depart: Feb 19, 2026 | From $168 Seen: 10 hours ago | |
| Portland (PDX) | Saint Louis (STL) | One-way | Saver | Depart: Jan 12, 2026 | From $174 Seen: 3 hours ago | |
| Anchorage (ANC) | Saint Louis (STL) | One-way | Saver | Depart: Dec 24, 2025 | From $249 Seen: 6 hours ago | |
| Puerto Vallarta (PVR) | Saint Louis (STL) | One-way | Saver | Depart: Jan 21, 2026 | From $299 Seen: 17 hours ago | |
| Puerto Vallarta (PVR) | Saint Louis (STL) | One-way | Saver | Depart: Jan 17, 2026 | From $303 Seen: 13 hours ago | |
| Anchorage (ANC) | Saint Louis (STL) | One-way | Saver | Depart: May 19, 2026 | From $340 Seen: 5 hours ago | |
| Anchorage (ANC) | Saint Louis (STL) | One-way | Saver | Depart: Jun 12, 2026 | From $340 Seen: 11 hours ago | |
| Anchorage (ANC) | Saint Louis (STL) | One-way | Saver | Depart: Aug 3, 2026 | From $366 Seen: 12 hours ago | |
| Anchorage (ANC) | Saint Louis (STL) | One-way | Saver | Depart: Dec 23, 2025 | From $566 Seen: 7 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.
Plan a trip to Saint Louis
St. Louis, Missouri - the Gateway City - was founded by French settlers and later ruled by Spain. Its position along the Mississippi River made it a perfect point for launching the Lewis and Clark expedition and for shipping goods by steamboat. The importance of St. Louis was celebrated at both the 1904 Olympics and the 1904 Louisiana Purchase Exposition; the St. Louis Art Museum was originally commissioned for the 1904 Exposition. Admission is free and the museum houses an expansive collection of African American art. The Museum of Westward Expansion is worth a visit, too, with its showcase on the early years and people of St. Louis. Then, get outside for a walk through the fantastic Missouri Botanical Garden, designed in 1859. Or, ride a bicycle along the 5-mile bike and walking trail of lush Forest Park.
View airport information for St. Louis (STL)