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ISM to ONT: distance & flight time
Kissimmee (Kissimmee Gateway Airport) → Ontario (Ontario International Airport)
2,163 mi
3,481 km · 1,880 nm
4h 42m
estimated nonstop flight time
-3h
time difference · heading west
See live ISM→ONT fares Phone-only fares on this route — call free
Flight time details
2,163 miles nonstop takes roughly 4h 42m gate to gate, flying west. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 3-hour time set-back when reading arrival times on your ticket.
The two airports
- ISM — Kissimmee Gateway Airport · Kissimmee, 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 ISM
- MCO · Orlando International Airport12 mi away
- ORL · Orlando Executive Airport19 mi away
- GIF · Winter Haven Regional Airport - Gilbert Field25 mi away
- TPA · Tampa International Airport70 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 ISM from ONT?
The flight distance from Kissimmee (ISM) to Ontario (ONT) is 2,163 miles (3,481 km, 1,880 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ISM to ONT?
A nonstop flight takes about 4h 42m 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 Kissimmee and Ontario?
Ontario is 3 hours behind Kissimmee.
What is the cheapest way to fly from ISM to ONT?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ISM–ONT that never appear on search engines, with no booking fees.