Dulles to Cahokia/St Louis (IAD–CPS) — Airlines, Schedules & Connections

IAD Airport Page →
684 mi airlines 0/wk
On-time Some delays Frequent delays
Connecting Flight Schedule 26 1-stop flights Verified 2w ago
Nonstop 1-Stop 2-Stop Hide separate tickets Hide overnight Hide codeshares
  Flight Airline AC Dep Arr Dur OTP Sched  
✈ Nonstop

No flights match your filters.

No nonstop flights on this route. connecting options below.

✦ 1-STOP More options, longer trips
✧ 2-STOP Loading... Reach the hardest destinations
Dulles to Cahokia/St Louis
Connecting service available through multiple hubs.
2 Airlines 684 mi 0h 47m nonstop -1h behind 26 1-stop hubs

IAD–CPS is served by 2 airlines with nonstop service. Delta Air Lines and FlyNordic lead the route. The flight covers 684 miles in approximately 0h 47m. Beyond nonstop, 26 hubs offer 1-stop connections.

Also explore IAD Routes CPS Routes IAD Live Flights CPS Live Flights IAD Delays
Carriers on this route

Airline Landscape

All carriers operating nonstop IAD–CPS service, compared side by side.
Airline Freq/wk Aircraft Duration Dep OTP Alliance Codeshares
DL Delta Air Lines 0 – – 100% SkyTeam –
LF FlyNordic 0 – – 100% – –
Alliance coverage
SkyTeam: DL (0 flights/wk, 0%)
Unaffiliated: LF (0 flights/wk, 0%)
OTP based on airport-level delay snapshots. Duration ranges reflect seasonal/directional variation.
Connections

Connection Landscape

Beyond nonstop. 1-stop and 2-stop options for IAD to CPS.
1-STOP
One-Stop Connections
26
Hubs
~3h
Fastest
~29h
Longest
Verified with published schedule alignment and minimum connection time.
2-STOP
Two-Stop Connections
83
Candidates
Two-stop connections loaded in the connections tab above.
Connections computed from published schedules with minimum connection time verification. Use the interactive explorer above the fold to filter by airline, tier, and layover time.
Know before you go

Travel Essentials

Practical planning for this route.
Time Difference
-1h
Cahokia/St Louis is 1 hour behind Dulles.
IAD: EDT · CPS: CDT

When it's 6:00 PM in Dulles, it's 5:00 PM in Cahokia/St Louis.
Distance & Flight Time
684 mi / 1,101 km
Nonstop flight time is approximately 0h 47m.
Getting to IAD

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).

Facts

IAD–CPS Quick Facts

Key statistics for the Dulles to Cahokia/St Louis route.
Route details
Distance684 mi / 1,101 km
Flight time0h 47m
Time difference-1 hour
Airlines (nonstop)2
1-stop connections26 hubs
Origin: IAD
Full nameWashington Dulles International Airport
IATA / ICAOIAD / KIAD
TimezoneAmerica/New_York
Passengers/yr26.0M
Elevation312 ft / 95 m
Destination: CPS
Full nameSt Louis Downtown Airport
IATA / ICAOCPS / KCPS
TimezoneAmerica/Chicago
Elevation413 ft / 126 m
FAQ

Frequently Asked Questions

Common questions about IAD to CPS flights.
Nonstop flights from Washington Dulles International Airport to St Louis Downtown Airport take approximately 0h 47m. The route covers 684 miles.
2 airlines operate nonstop service: Delta Air Lines and FlyNordic.
Yes, 1-stop connections are available through PIT, CLT, PHL, LGA, MDW, CLE, BOS, SAV, JFK, PBI, RSW, BNA, FLL, ADS, HOU, MIA, AUS, LAS, PHX, SJC, SEA, LAX, DEN, IAH, DAL and DFW. These options provide additional schedule flexibility.
Cahokia/St Louis is 1 hour behind Dulles.
Click the 'Search Flights' button to check availability and prices on Google Flights. You can also compare airlines and schedules on this page to find the best option.
See the On-Time Performance section for the latest delay data at both airports. This shows departure and arrival reliability to help you plan.
Route data is updated regularly from official airline schedules. On-time performance data comes from recent airport delay snapshots.

Flights from IAD to CPS

Washington Dulles International Airport (IAD) and St Louis Downtown Airport (CPS) are connected by nonstop service from Delta Air Lines and FlyNordic.

IAD to CPS Flight Duration and Schedule

Nonstop flight time from IAD to CPS ranges from 0 hours 47 minutes. The route covers a distance of 684 miles (1,101 km).

Connecting Options and Alternatives

26 one-stop connections are available, with the fastest taking approximately 3 hours via PIT. Two-stop connections are also available via intermediate hubs.