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YSL to ONT: distance & flight time
St Leonard (St Leonard Airport) → Ontario (Ontario International Airport)
2,711 mi
4,363 km · 2,356 nm
5h 47m
estimated nonstop flight time
—
time difference · heading west
See live YSL→ONT fares Phone-only fares on this route — call free
Flight time details
2,711 miles nonstop takes roughly 5h 47m gate to gate, flying west. 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
- YSL — St Leonard Airport · St Leonard, Canada
- ONT — Ontario International Airport · Ontario, 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 YSL
- CAR · Caribou Municipal Airport22 mi away
- WFK · Northern Aroostook Regional Airport24 mi away
- PQI · Northern Maine Regional Airport at Presque Isle34 mi away
- HUL · Houlton International Airport71 mi away
Near ONT
- CCB · Cable Airport6 mi away
- CNO · Chino Airport6 mi away
- LAX · Los Angeles International Airport47 mi away
- RAL · Riverside Municipal Airport11 mi away
Frequently asked questions
How far is YSL from ONT?
The flight distance from St Leonard (YSL) to Ontario (ONT) is 2,711 miles (4,363 km, 2,356 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from YSL to ONT?
A nonstop flight takes about 5h 47m 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 YSL to ONT?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on YSL–ONT that never appear on search engines, with no booking fees.