Dulles to Cahokia/St Louis (IAD–CPS) — 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: May 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.
IAD–CPS had nonstop service from Delta Air Lines, Contour Airlines and Sun Country Airlines, last on the schedule in May 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 684 miles in 2h 8m.
Airline Landscape
| Airline | Freq/wk | Aircraft | Duration | Dep OTP | Alliance | Codeshares |
|---|---|---|---|---|---|---|
| DL Delta Air Lines | 0 | – | – | SkyTeam | – | |
| LF Contour Airlines | 0 | – | – | – | – | |
| SY Sun Country Airlines | 0 | – | – | – | – |
On-Time Performance
Other ways to reach Cahokia/St Louis from Dulles
| Metric | IAD→CPS | BWI→CPS |
|---|---|---|
| Distance from IAD | – | 45 mi |
| Nonstop airlines | – | 1 |
| Weekly flights | – | 1 |
| Flight time | 2h 8m | 1h 40m |
| Departure OTP | 56% | – |
Travel Essentials
IAD: EDT · CPS: CDT
When it's 6:00 PM in Dulles, it's 5:00 PM in Cahokia/St Louis.
WMATA Silver Line Metro now reaches Dulles directly; take Silver Line to Washington Dulles Airport station (about 65 min from Metro Center, ~$7). The connection opened in late 2022.Ride-shares from downtown DC run $35–60 and take 35–50 minutes via I-66 (longer during peak hours). Washington Flyer coach to Wiehle-Reston East Metro costs $6. The airport is 27 miles from downtown; taxis are expensive ($60–80).
IAD–CPS Quick Facts
Frequently Asked Questions
Flights from IAD to CPS
Washington Dulles International Airport (IAD) and St Louis Downtown Airport (CPS) had nonstop service from Delta Air Lines, Contour Airlines and Sun Country Airlines, last on the schedule in May 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.
IAD to CPS Flight Duration and Schedule
Nonstop flight time from IAD to CPS is about 2 hours 8 minutes gate to gate. The route covers a distance of 684 miles (1,101 km).
Connecting Options and Alternatives
Nearby alternative airports include Baltimore (BWI).