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IAG to STL: distance & flight time
Niagara Falls (Niagara Falls International Airport) → St. Louis (St Louis Lambert International Airport)
667 mi
1,074 km · 580 nm
1h 55m
estimated nonstop flight time
-1h
time difference · heading southwest
See live IAG→STL fares Phone-only fares on this route — call free
Flight time details
667 miles nonstop takes roughly 1h 55m gate to gate, flying southwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time set-back when reading arrival times on your ticket.
The two airports
- IAG — Niagara Falls International Airport · Niagara Falls, United States
- STL — St Louis Lambert International Airport · 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 STL
- SUS · Spirit of St Louis Airport16 mi away
- ALN · St Louis Regional Airport20 mi away
- BLV · Scott AFB/Midamerica Airport32 mi away
- SPI · Abraham Lincoln Capital Airport84 mi away
Frequently asked questions
How far is IAG from STL?
The flight distance from Niagara Falls (IAG) to St. Louis (STL) is 667 miles (1,074 km, 580 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from IAG to STL?
A nonstop flight takes about 1h 55m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
What is the time difference between Niagara Falls and St. Louis?
St. Louis is 1 hour behind Niagara Falls.
What is the cheapest way to fly from IAG to STL?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on IAG–STL that never appear on search engines, with no booking fees.