Direct flights from St. Louis to Seattle
22 nonstop flights a week on 2 airlines. Zero layovers — one hop from STL to SEA.
Flight time: about 3h55m nonstop
Which days does it fly?
When does it fly?
Departure times in St. Louis local time, from flights observed over the last 7 days.
| Flight | Departs | Duration | Days |
|---|---|---|---|
| Alaska ASA473 | 6:32a | 3h49m | Wed, Fri, Sat, Sun |
| Alaska ASA473 | 6:36a | 3h58m | Tue, Thu |
| Alaska ASA473 | 7:12a | 3h58m | Mon |
| Southwest SWA2190 | 8:40a | 3h52m | Mon, Fri |
| Southwest SWA2190 | 11:07a | 3h41m | Sun |
| Southwest SWA159 | 3:07p | 3h57m | Sat |
| Alaska ASA388 | 3:22p | 3h41m | Tue, Thu, Sun |
| Alaska ASA388 | 3:28p | 3h42m | Wed, Fri, Sat |
| Alaska ASA388 | 3:43p | 4h5m | Mon |
| Alaska ASA674 | 7:51p | 4h10m | Mon |
| Alaska ASA674 | 7:59p | 3h57m | Fri |
| Alaska ASA674 | 8:20p | 3h51m | Thu, Sun |
SouthwestThe route
One hop: STL → SEADrag to pan · scroll with ⌘/Ctrl to zoom · arrow keys when focused
Nonstop from St. Louis (STL) to Seattle (SEA)
St. Louis Lambert International Airport (STL) has 22 nonstop flights a week to Seattle (SEA), operated by Alaska and Southwest. No layovers, no connections — one hop out of STL 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 St. Louis to Seattle?
The nonstop flight from St. Louis (STL) to Seattle (SEA) takes about 3h55m in the air, based on recently observed nonstop departures.