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YQS to SDF: distance & flight time
St Thomas (St Thomas Municipal Airport) → Louisville (Louisville International Standiford Field)
400 mi
643 km · 347 nm
1h 31m
estimated nonstop flight time
—
time difference · heading southwest
See live YQS→SDF fares Phone-only fares on this route — call free
Flight time details
400 miles nonstop takes roughly 1h 31m 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
- YQS — St Thomas Municipal Airport · St Thomas, Canada
- SDF — Louisville International Standiford Field · Louisville, 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 YQS
- YXU · London Airport18 mi away
- YCE · Centralia / James T. Field Memorial Aerodrome41 mi away
- YYZ · Lester B. Pearson International Airport97 mi away
- YKF · Waterloo Airport60 mi away
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
Frequently asked questions
How far is YQS from SDF?
The flight distance from St Thomas (YQS) to Louisville (SDF) is 400 miles (643 km, 347 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from YQS to SDF?
A nonstop flight takes about 1h 31m 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 cheapest way to fly from YQS to SDF?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on YQS–SDF that never appear on search engines, with no booking fees.