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SDF to IAG: distance & flight time
Louisville (Louisville International Standiford Field) → Niagara Falls (Niagara Falls International Airport)
493 mi
793 km · 428 nm
1h 32m
estimated nonstop flight time
Same time
time difference · heading northeast
See live SDF→IAG fares Phone-only fares on this route — call free
Flight time details
493 miles nonstop takes roughly 1h 32m gate to gate, flying northeast. 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
- SDF — Louisville International Standiford Field · Louisville, 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 SDF
- LOU · Bowman Field5 mi away
- FTK · Godman Army Air Field22 mi away
- FFT · Capital City Airport45 mi away
- LEX · Blue Grass Airport62 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 SDF from IAG?
The flight distance from Louisville (SDF) to Niagara Falls (IAG) is 493 miles (793 km, 428 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SDF to IAG?
A nonstop flight takes about 1h 32m 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 SDF to IAG?
Nonstop service on SDF–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 32m nonstop estimate.
What is the cheapest way to fly from SDF to IAG?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SDF–IAG that never appear on search engines, with no booking fees.
Why are some SDF to IAG fares phone-only?
Consolidator contracts let us sell certain SDF–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.