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RME to ONT: distance & flight time
Rome (Griffiss International Airport) → Ontario (Ontario International Airport)
2,337 mi
3,761 km · 2,031 nm
5h 3m
estimated nonstop flight time
-3h
time difference · heading west
See live RME→ONT fares Phone-only fares on this route — call free
Flight time details
2,337 miles nonstop takes roughly 5h 3m 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
- RME — Griffiss International Airport · Rome, 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 RME
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 RME from ONT?
The flight distance from Rome (RME) to Ontario (ONT) is 2,337 miles (3,761 km, 2,031 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from RME to ONT?
A nonstop flight takes about 5h 3m 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 Rome and Ontario?
Ontario is 3 hours behind Rome.
What is the cheapest way to fly from RME to ONT?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on RME–ONT that never appear on search engines, with no booking fees.