Direct flights from Seattle to St Louis
23 nonstop flights a week on 2 airlines. Zero layovers — one hop from SEA to STL.
Flight time: about 3h26m nonstop
Which days does it fly?
When does it fly?
Departure times in Seattle local time, from flights observed over the last 7 days.
| Flight | Departs | Duration | Days |
|---|---|---|---|
| Alaska ASA388 | 8:24a | 3h12m | Thu |
| Alaska ASA388 | 8:27a | 3h26m | Mon, Tue, Fri, Sat, Sun |
| Alaska ASA388 | 8:38a | 3h13m | Wed |
| Southwest SWA3149 | 10:06a | 3h15m | Sat |
| Southwest SWA4060 | 11:39a | 3h32m | Sun |
| Southwest SWA2631 | 12:25p | 3h27m | Mon |
| Alaska ASA672 | 1:00p | 3h38m | Mon, Thu, Sun |
| Southwest SWA2631 | 1:12p | 3h18m | Thu–Fri |
| Alaska ASA672 | 1:20p | 3h16m | Tue, Wed, Fri, Sat |
| Alaska ASA472 | 6:19p | 3h30m | Mon, Sun |
| Alaska ASA472 | 6:46p | 3h39m | Thu–Fri |
SouthwestThe route
One hop: SEA → STLDrag to pan · scroll with ⌘/Ctrl to zoom · arrow keys when focused
Nonstop from Seattle (SEA) to St Louis (STL)
Seattle–Tacoma International Airport (SEA) has 23 nonstop flights a week to St Louis (STL), operated by Alaska and Southwest. No layovers, no connections — one hop out of SEA and you're there.
This route flies every day of the week, so any travel day works. Route data updated October 2026 from observed departures.
Route data updated October 2026 from observed flight departures. Schedules change — always confirm with the airline before booking.
How long is the flight from Seattle to St Louis?
The nonstop flight from Seattle (SEA) to St Louis (STL) takes about 3h26m in the air, based on recently observed nonstop departures.