Cahokia/St Louis to Seattle (CPS–SEA) — Airlines, Schedules & Connections
No flights match your filters.
No nonstop flights on this route. connecting options below.
CPS–SEA is served by 1 airline with nonstop service. Sun Country Airlines leads the route. The flight covers 1,722 miles in approximately 3h 50m. Beyond nonstop, 20 hubs offer 1-stop connections.
Airline Landscape
| Airline | Freq/wk | Aircraft | Duration | Dep OTP | Alliance | Codeshares |
|---|---|---|---|---|---|---|
| SY Sun Country Airlines | 0 | – | – | – | – | – |
Connection Landscape
Other ways to reach Seattle from Cahokia/St Louis
| Metric | CPS→SEA | STL→SEA |
|---|---|---|
| Distance from CPS | – | 17 mi |
| Nonstop airlines | 1 | 4 |
| Weekly flights | 0 | 49 |
| Flight time | 3h 50m | 4h 29m |
Travel Essentials
CPS: CDT · SEA: PDT
When it's 6:00 PM in Cahokia/St Louis, it's 4:00 PM in Seattle.
Link Light Rail from the airport station (inside the terminal) to downtown Seattle takes 38 minutes ($3.50). No transfers needed; trains run 5am to 1am daily.Taxis and ride-shares to downtown cost $35–55. For Bellevue and Eastside destinations (across Lake Washington), ride-share is faster than Link. Car rentals are in the consolidated rental facility; take the free shuttle from baggage claim. Sound Transit buses serve Tacoma, Renton, and Federal Way.
Marine west coast climate. Winters are mild but persistently grey and rainy (3–9°C). Snow is rare at sea level but can occur December through February, causing significant disruptions when it does. The airport sits between Seattle and Tacoma in an area that receives more fog and low cloud than downtown Seattle.
Summers are famously pleasant (18–25°C) with low humidity and mostly clear skies, one of the best flying climates in the US from June through September. The wettest months are November through January.
CPS–SEA Quick Facts
Frequently Asked Questions
Flights from CPS to SEA
St Louis Downtown Airport (CPS) and Seattle–Tacoma International Airport (SEA) are connected by nonstop service from Sun Country Airlines.
CPS to SEA Flight Duration and Schedule
Nonstop flight time from CPS to SEA ranges from 3 hours 50 minutes. The route covers a distance of 1,722 miles (2,771 km).
Connecting Options and Alternatives
20 one-stop connections are available, with the fastest taking approximately 6 hours via MSP. Two-stop connections are also available via intermediate hubs. Nearby alternative airports include St Louis (STL).