Need help booking?
Unpublished phone-only deals available
STL to IAG: distance & flight time
St. Louis (St Louis Lambert International Airport) → Niagara Falls (Niagara Falls International Airport)
667 mi
1,074 km · 580 nm
1h 55m
estimated nonstop flight time
+1h
time difference · heading northeast
See live STL→IAG fares Phone-only fares on this route — call free
Flight time details
667 miles nonstop takes roughly 1h 55m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time gain when reading arrival times on your ticket.
The two airports
- STL — St Louis Lambert International Airport · St. Louis, United States
- IAG — Niagara Falls International Airport · Niagara Falls, 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 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
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
Frequently asked questions
How far is STL from IAG?
The flight distance from St. Louis (STL) to Niagara Falls (IAG) is 667 miles (1,074 km, 580 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from STL to IAG?
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.
Are there nonstop flights from STL to IAG?
Nonstop service on STL–IAG 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 55m nonstop estimate.
What is the time difference between St. Louis and Niagara Falls?
Niagara Falls is 1 hour ahead of St. Louis.
What is the cheapest way to fly from STL to IAG?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on STL–IAG that never appear on search engines, with no booking fees.
Why are some STL to IAG fares phone-only?
Consolidator contracts let us sell certain STL–IAG 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.