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RMA to ONT: distance & flight time
Roma (Roma Airport) → Ontario (Ontario International Airport)
7,413 mi
11,929 km · 6,441 nm
15h
estimated nonstop flight time
-17h
time difference · heading northeast
See live RMA→ONT fares Phone-only fares on this route — call free
Flight time details
7,413 miles nonstop takes roughly 15h gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 17-hour time set-back when reading arrival times on your ticket.
The two airports
- RMA — Roma Airport · Roma, Australia
- 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 RMA
- XTO · Taroom Airport87 mi away
- SGO · St George Airport105 mi away
- CCL · Chinchilla Airport115 mi away
- TDR · Theodore Airport135 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 RMA from ONT?
The flight distance from Roma (RMA) to Ontario (ONT) is 7,413 miles (11,929 km, 6,441 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from RMA to ONT?
A nonstop flight takes about 15h 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 Roma and Ontario?
Ontario is 17 hours behind Roma.
What is the cheapest way to fly from RMA to ONT?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on RMA–ONT that never appear on search engines, with no booking fees.