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OKJ to ONT: distance & flight time
Okayama (Okayama Airport) → Ontario (Ontario International Airport)
5,811 mi
9,352 km · 5,049 nm
11h 52m
estimated nonstop flight time
-16h
time difference · heading northeast
See live OKJ→ONT fares Phone-only fares on this route — call free
Flight time details
5,811 miles nonstop takes roughly 11h 52m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 16-hour time set-back when reading arrival times on your ticket.
The two airports
- OKJ — Okayama Airport · Okayama, Japan
- 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 OKJ
- TAK · Takamatsu Airport39 mi away
- TTJ · Tottori Airport56 mi away
- HIJ · Hiroshima Airport58 mi away
- TKS · Tokushima Airport/JMSDF Air Base61 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 OKJ from ONT?
The flight distance from Okayama (OKJ) to Ontario (ONT) is 5,811 miles (9,352 km, 5,049 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from OKJ to ONT?
A nonstop flight takes about 11h 52m 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 Okayama and Ontario?
Ontario is 16 hours behind Okayama.
What is the cheapest way to fly from OKJ to ONT?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on OKJ–ONT that never appear on search engines, with no booking fees.