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YQS to ONT: distance & flight time
St Thomas (St Thomas Municipal Airport) → Ontario (Ontario International Airport)
2,047 mi
3,295 km · 1,779 nm
4h 29m
estimated nonstop flight time
—
time difference · heading west
See live YQS→ONT fares Phone-only fares on this route — call free
Flight time details
2,047 miles nonstop takes roughly 4h 29m 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
- YQS — St Thomas Municipal Airport · St Thomas, 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 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 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 YQS from ONT?
The flight distance from St Thomas (YQS) to Ontario (ONT) is 2,047 miles (3,295 km, 1,779 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from YQS to ONT?
A nonstop flight takes about 4h 29m 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 ONT?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on YQS–ONT that never appear on search engines, with no booking fees.