Cahokia/St Louis to Seattle (CPS–SEA) — 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.
Last scheduled nonstop: Apr 2026.
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.
CPS–SEA had nonstop service from Delta Air Lines and Sun Country Airlines, last on the schedule in April 2026. There's no nonstop on it right now, so today you'd fly it with one stop. The connecting options below are sorted by layover. Nonstop, it's about 1,722 miles in 3h 50m.
Airline Landscape
| Airline | Freq/wk | Aircraft | Duration | Dep OTP | Alliance | Codeshares |
|---|---|---|---|---|---|---|
| DL Delta Air Lines | 0 | – | – | – | SkyTeam | – |
| SY Sun Country Airlines | 0 | – | – | – | – | – |
On-Time Performance
Other ways to reach Seattle from Cahokia/St Louis
| Metric | CPS→SEA | STL→SEA |
|---|---|---|
| Distance from CPS | – | 17 mi |
| Nonstop airlines | – | 6 |
| Weekly flights | – | 54 |
| Flight time | 3h 50m | 4h 15m |
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) had nonstop service from Delta Air Lines and Sun Country Airlines, last on the schedule in April 2026. The nonstop is dormant right now, so the way to fly it today is one connection, and the options above are sorted by layover.
CPS to SEA Flight Duration and Schedule
Nonstop flight time from CPS to SEA is about 3 hours 50 minutes gate to gate. The route covers a distance of 1,722 miles (2,771 km).
Connecting Options and Alternatives
Nearby alternative airports include St Louis (STL).