Dulles to Alton/St Louis (IAD–ALN) — Airlines, Schedules & Connections

IAD Airport Page →
676 mi airlines 1/wk
On-time Some delays Frequent delays
Flight Schedule 0 flights Verified 3h ago
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  Flight Airline AC Dep Arr Dur OTP Sched  

No flights match your filters.

No nonstop flights on this route. connecting options below.

✦ 1-STOP
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Dulles to Alton/St Louis
Connecting service available through multiple hubs.
1 Flights/wk 676 mi 0h 59m nonstop 2 1-stop hubs

While no nonstop service exists between IAD and ALN, connecting options are available through 2 hubs.

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

Connection Landscape

Beyond nonstop. 1-stop and 2-stop options for IAD to ALN.
1-STOP
One-Stop Connections
2
Hubs
~3h
Fastest
~5h
Longest
CLT ~3h 42m SRQ ~5h 8m
Verified with published schedule alignment and minimum connection time.
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 → ALN
54%
Frequent delays expected. Consider flexible booking.
Departing
54%
Return
ALN → IAD
72%
Moderate delays possible. Allow buffer time.
Arriving
72%
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
Alton/St Louis is 0 hours the same as Dulles.
IAD: EDT · ALN: EDT

When it's 6:00 PM in Dulles, it's 6:00 PM in Alton/St Louis.
Distance & Flight Time
676 mi / 1,088 km
Nonstop flight time is approximately 0h 59m.
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–ALN Quick Facts

Key statistics for the Dulles to Alton/St Louis route.
Route details
Distance676 mi / 1,088 km
Flight time0h 59m
Time difference0 hours
Airlines (nonstop)0
Weekly flights1 out
1-stop connections2 hubs
Origin: IAD
Full nameWashington Dulles International Airport
IATA / ICAOIAD / KIAD
TimezoneAmerica/New_York
Passengers/yr26.0M
Elevation312 ft / 95 m
Destination: ALN
Full nameSt Louis Regional Airport
IATA / ICAOALN / KALN
TimezoneAmerica/Indiana/Vincennes
Elevation544 ft / 166 m
FAQ

Frequently Asked Questions

Common questions about IAD to ALN flights.
Nonstop flights from Washington Dulles International Airport to St Louis Regional Airport take approximately 0h 59m. The route covers 676 miles.
There are approximately 1 nonstop flights per week from IAD to ALN.
Yes, 1-stop connections are available through CLT and SRQ. These options provide additional schedule flexibility.
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 ALN

Washington Dulles International Airport (IAD) and St Louis Regional Airport (ALN) are connected through multiple connecting hub airports.

IAD to ALN Flight Duration and Schedule

Nonstop flight time from IAD to ALN ranges from 0 hours 59 minutes. The route covers a distance of 676 miles (1,088 km).

Connecting Options and Alternatives

2 one-stop connections are available, with the fastest taking approximately 3 hours via CLT.