Dulles to St Louis (IAD–SUS) — Airlines, Schedules & Connections

IAD Airport Page →
710 mi airlines 2/wk
On-time Some delays Frequent delays
Flight Schedule 0 flights Verified 49m ago
Nonstop 1-Stop 2-Stop Hide separate tickets Hide overnight
  Flight Airline AC Dep Arr Dur OTP Sched  

No flights match your filters.

No nonstop flights on this route. connecting options below.

✦ 1-STOP
✧ 2-STOP Loading...
Dulles to St Louis
Connecting service available through multiple hubs.
2 Flights/wk 710 mi 0h 35m nonstop 44 1-stop hubs

While no nonstop service exists between IAD and SUS, connecting options are available through 44 hubs.

Also explore IAD Routes SUS Routes IAD Live Flights SUS Live Flights IAD Delays
Connections

Connection Landscape

Beyond nonstop. 1-stop and 2-stop options for IAD to SUS.
1-STOP
One-Stop Connections
44
Hubs
~3h
Fastest
~34h
Longest
CRW ~3h 44m IND ~3h 48m CLT ~3h 48m BHM ~3h 55m SGF ~4h 4m
Verified with published schedule alignment and minimum connection time.
2-STOP
Two-Stop Connections
134
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.
Reliability

On-Time Performance

What to expect at each end of your journey.
Outbound
IAD → SUS
55%
Frequent delays expected. Consider flexible booking.
Departing
55%
Return
SUS → IAD
73%
Moderate delays possible. Allow buffer time.
Arriving
73%
OTP = percentage of flights arriving within 15 min of schedule. Based on airport-level delay snapshots. IAD delays →
Know before you go

Travel Essentials

Practical planning for this route.
Time Difference
0h
St Louis is 0 hours the same as Dulles.
IAD: EDT · SUS: EDT

When it's 6:00 PM in Dulles, it's 6:00 PM in St Louis.
Distance & Flight Time
710 mi / 1,143 km
Nonstop flight time is approximately 0h 35m to 0h 53m.
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–SUS Quick Facts

Key statistics for the Dulles to St Louis route.
Route details
Distance710 mi / 1,143 km
Flight time0h 35m to 0h 53m
Time difference0 hours
Airlines (nonstop)0
Weekly flights2 out / 1 return
1-stop connections44 hubs
Origin: IAD
Full nameWashington Dulles International Airport
IATA / ICAOIAD / KIAD
TimezoneAmerica/New_York
Passengers/yr26.0M
Elevation312 ft / 95 m
Destination: SUS
Full nameSpirit of St Louis Airport
IATA / ICAOSUS / KSUS
TimezoneAmerica/Indiana/Vincennes
Elevation463 ft / 141 m
FAQ

Frequently Asked Questions

Common questions about IAD to SUS flights.
Nonstop flights from Washington Dulles International Airport to Spirit of St Louis Airport take approximately 0h 35m to 0h 53m. The route covers 710 miles.
There are approximately 2 nonstop flights per week from IAD to SUS. The return direction has about 1 weekly flights.
Yes, 1-stop connections are available through CRW, IND, CLT, BHM, SGF, SAV, LGA, CLE, FTY, STL, BNA, PIE, BOS, JAX, JFK, OMA, SRQ, CAE, BDL, MCI, IAH, PBI, MSY, FLL, DAL, MIA, MCO, SLC, PHX, SNA, BZN, DEN, LAS, SJC, PSP, PDX, SFO, SXM, ZRH, MSP, ORD, DFW, AUS and HND. These options provide additional schedule flexibility.
Yes, return flights from SUS to IAD are available. Use the direction toggle at the top to view the return schedule.
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 SUS

Washington Dulles International Airport (IAD) and Spirit of St Louis Airport (SUS) are connected through multiple connecting hub airports.

IAD to SUS Flight Duration and Schedule

Nonstop flight time from IAD to SUS ranges from 0 hours 35 minutes to 0 hours 53 minutes. The route covers a distance of 710 miles (1,143 km). There are approximately 2 weekly flights outbound and 1 return, totaling 3 flights per week in both directions.

Connecting Options and Alternatives

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