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YST to ONT: distance & flight time
St. Theresa Point (St. Theresa Point Airport) → Ontario (Ontario International Airport)
1,759 mi
2,831 km · 1,528 nm
3h 55m
estimated nonstop flight time
-2h
time difference · heading southwest
See live YST→ONT fares Phone-only fares on this route — call free
Flight time details
1,759 miles nonstop takes roughly 3h 55m gate to gate, flying southwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 2-hour time set-back when reading arrival times on your ticket.
The two airports
- YST — St. Theresa Point Airport · St. Theresa Point, 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 YST
- YIV · Island Lake Airport8 mi away
- YGO · Gods Lake Narrows Airport51 mi away
- YRS · Red Sucker Lake Airport57 mi away
- ZGI · Gods River Airport75 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 YST from ONT?
The flight distance from St. Theresa Point (YST) to Ontario (ONT) is 1,759 miles (2,831 km, 1,528 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from YST to ONT?
A nonstop flight takes about 3h 55m 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 time difference between St. Theresa Point and Ontario?
Ontario is 2 hours behind St. Theresa Point.
What is the cheapest way to fly from YST to ONT?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on YST–ONT that never appear on search engines, with no booking fees.