Seattle to St Louis (SEA–STL) — Airlines, Schedules & Connections
No flights match your filters.
No scheduled airline flights on this route — it's flown by charter / private operators (). No nonstop flights on this route. connecting options below.
Most recently operated nonstop flights — the month shown is when each was last scheduled. Most destinations remain reachable with a connection.
No discontinued nonstop flights on record for this route.
SEA–STL is served by 3 airlines with nonstop service. Alaska Airlines, Southwest Airlines and Delta Air Lines lead the route. The flight covers 1,705 miles in approximately 3h 56m. Beyond nonstop, 1-stop connecting options are also available.
Airline Landscape
| Airline | Freq/wk | Aircraft | Duration | Dep OTP | Alliance | Codeshares |
|---|---|---|---|---|---|---|
| AS Alaska Airlines Also: AY, HA, JL, QR | 39 | 73J, 7M9 | 3h51-4h01 | Oneworld | AY, HA, JL, QR | |
| WN Southwest Airlines | 12 | 737, 738, 73H, 7M8, 7S7 | 3h41-4h | – | – | |
| DL Delta Air Lines | 1 | – | – | SkyTeam | – |
Weekly Schedule Pattern
Connection Landscape
On-Time Performance
Other ways to reach St Louis from Seattle
| Metric | SEA→STL | BFI→STL | YKM→STL |
|---|---|---|---|
| Distance from SEA | – | 5 mi | 103 mi |
| Nonstop airlines | 3 | 2 | 1 |
| Weekly flights | 73 | 1 | – |
| Flight time | 3h 56m | 3h 28m | 3h 28m |
| Departure OTP | 48% | – | – |
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, Southwest Airlines and Delta Air Lines. With 73 weekly departures, this is a heavily served route.
SEA to STL Flight Duration and Schedule
Nonstop flight time from SEA to STL is about 3 hours 56 minutes gate to gate. The route covers a distance of 1,705 miles (2,744 km). There are approximately 73 weekly flights outbound and 54 return, totaling 127 flights per week in both directions.
Connecting Options and Alternatives
1-stop connecting options are also available, commonly via Denver, Minneapolis–Saint Paul and Kansas City. Two-stop connections are also available via intermediate hubs. Nearby alternative airports include Seattle (BFI) and Yakima (YKM).