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SEP to ONT: distance & flight time
Stephenville (Stephenville Clark Regional Airport) → Ontario (Ontario International Airport)
1,129 mi
1,817 km · 981 nm
2h 55m
estimated nonstop flight time
-2h
time difference · heading west
See live SEP→ONT fares Phone-only fares on this route — call free
Flight time details
1,129 miles nonstop takes roughly 2h 55m gate to gate, flying west. 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
- SEP — Stephenville Clark Regional Airport · Stephenville, United States
- 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 SEP
- MWL · Mineral Wells Airport40 mi away
- DFW · Dallas Fort Worth International Airport81 mi away
- BKD · Stephens County Airport54 mi away
- FWH · NAS Fort Worth JRB/Carswell Field57 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 SEP from ONT?
The flight distance from Stephenville (SEP) to Ontario (ONT) is 1,129 miles (1,817 km, 981 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SEP to ONT?
A nonstop flight takes about 2h 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 Stephenville and Ontario?
Ontario is 2 hours behind Stephenville.
What is the cheapest way to fly from SEP to ONT?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SEP–ONT that never appear on search engines, with no booking fees.