Need help booking?
Unpublished phone-only deals available
IAG to ALN: distance & flight time
Niagara Falls (Niagara Falls International Airport) → Alton/St Louis (St Louis Regional Airport)
647 mi
1,042 km · 562 nm
1h 52m
estimated nonstop flight time
—
time difference · heading southwest
See live IAG→ALN fares Phone-only fares on this route — call free
Flight time details
647 miles nonstop takes roughly 1h 52m gate to gate, flying southwest. Add 45–90 minutes per connection if there's no nonstop service. Both airports share the same local time, so schedules read exactly as flown.
The two airports
- IAG — Niagara Falls International Airport · Niagara Falls, United States
- ALN — St Louis Regional Airport · Alton/St Louis, United States
Distances are great-circle ("as the crow flies") — the same basis airlines use for frequent-flyer miles.
Alternate airports can cut this fare
Flying from or into a nearby airport is the #1 trick our agents use to beat online prices. Call and we'll compare every combination on one call.
Near IAG
- YYZ · Lester B. Pearson International Airport52 mi away
- YCM · Niagara District Airport13 mi away
- BUF · Buffalo Niagara International Airport16 mi away
- DU9 · Dunnville Airport37 mi away
Near ALN
- STL · St Louis Lambert International Airport20 mi away
- BLV · Scott AFB/Midamerica Airport26 mi away
- SUS · Spirit of St Louis Airport36 mi away
- SPI · Abraham Lincoln Capital Airport69 mi away
Frequently asked questions
How far is IAG from ALN?
The flight distance from Niagara Falls (IAG) to Alton/St Louis (ALN) is 647 miles (1,042 km, 562 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from IAG to ALN?
A nonstop flight takes about 1h 52m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
Are there nonstop flights from IAG to ALN?
Nonstop service on IAG–ALN depends on the season and the day of week. Run the fare search on this page with the nonstop filter applied to see current direct options; when there is no nonstop, a single connection through a carrier hub adds roughly 2–4 hours to the 1h 52m nonstop estimate.
What is the cheapest way to fly from IAG to ALN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on IAG–ALN that never appear on search engines, with no booking fees.
Why are some IAG to ALN fares phone-only?
Consolidator contracts let us sell certain IAG–ALN tickets below the price airlines permit us to publish online, so those fares can only be quoted over the phone. Call the travel desk and an agent will check phone-only inventory for your dates.