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ATO to ONT: distance & flight time
Athens (Ohio University Snyder Field) → Ontario (Ontario International Airport)
1,980 mi
3,187 km · 1,721 nm
4h 21m
estimated nonstop flight time
-3h
time difference · heading west
See live ATO→ONT fares Phone-only fares on this route — call free
Flight time details
1,980 miles nonstop takes roughly 4h 21m 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
- ATO — Ohio University Snyder Field · Athens, 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 ATO
- PMH · Greater Portsmouth Regional Airport42 mi away
- PKB · Mid Ohio Valley Regional Airport43 mi away
- ZZV · Zanesville Municipal Airport54 mi away
- LCK · Rickenbacker International Airport56 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 ATO from ONT?
The flight distance from Athens (ATO) to Ontario (ONT) is 1,980 miles (3,187 km, 1,721 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ATO to ONT?
A nonstop flight takes about 4h 21m 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 Athens and Ontario?
Ontario is 3 hours behind Athens.
What is the cheapest way to fly from ATO to ONT?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ATO–ONT that never appear on search engines, with no booking fees.