Seattle to St Louis (SEA–STL) — Airlines, Schedules & Connections
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No nonstop flights on this route. connecting options below.
SEA–STL is served by 1 airline with nonstop service. Alaska Airlines leads the route. The flight covers 1,705 miles in approximately 3h 57m. Beyond nonstop, 75 hubs offer 1-stop connections.
Airline Landscape
| Airline | Freq/wk | Aircraft | Duration | Dep OTP | Alliance | Codeshares |
|---|---|---|---|---|---|---|
| AS Alaska Airlines Also: HA, JL, QR | 35 | 73J, 7M9, B39M | 3h59-4h11 | Oneworld | HA, JL, QR |
Weekly Schedule Pattern
Connection Landscape
Travel Essentials
SEA: PDT · STL: CDT
When it's 6:00 PM in Seattle, it's 8:00 PM in St Louis.
Link Light Rail runs from downtown Seattle (Westlake station) to the airport in 38 minutes ($3.50 peak). Trains run every 6–12 minutes during peak hours from 5am to 1am. Ride-shares run $30–50 from downtown; SR-99 and I-5 can be heavily congested southbound during afternoon rush (3–7pm).
Sound Transit 574 express bus serves Tacoma ($2.50–4). Sounder commuter rail connects Tacoma to the airport area via a shuttle.
SEA–STL Quick Facts
Frequently Asked Questions
Flights from SEA to STL
Seattle–Tacoma International Airport (SEA) and St. Louis Lambert International Airport (STL) are connected by nonstop service from Alaska Airlines. With 49 weekly departures, this is a heavily served route.
SEA to STL Flight Duration and Schedule
Nonstop flight time from SEA to STL ranges from 3 hours 57 minutes to 4 hours 11 minutes. The route covers a distance of 1,705 miles (2,744 km). There are approximately 49 weekly flights outbound and 49 return, totaling 98 flights per week in both directions.
Connecting Options and Alternatives
75 one-stop connections are available, with the fastest taking approximately 4 hours via BZN. Two-stop connections are also available via intermediate hubs.