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GNB to ONT: distance & flight time
Grenoble (Grenoble-Isère Airport) → Ontario (Ontario International Airport)
5,893 mi
9,484 km · 5,121 nm
12h 1m
estimated nonstop flight time
-9h
time difference · heading northwest
See live GNB→ONT fares Phone-only fares on this route — call free
Flight time details
5,893 miles nonstop takes roughly 12h 1m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 9-hour time set-back when reading arrival times on your ticket.
The two airports
- GNB — Grenoble-Isère Airport · Grenoble, France
- 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 GNB
- LYS · Lyon Saint-Exupéry Airport28 mi away
- LYN · Lyon-Bron Airport31 mi away
- CMF · Chambéry-Savoie Airport33 mi away
- VAF · Valence-Chabeuil Airport35 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 GNB from ONT?
The flight distance from Grenoble (GNB) to Ontario (ONT) is 5,893 miles (9,484 km, 5,121 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from GNB to ONT?
A nonstop flight takes about 12h 1m 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 Grenoble and Ontario?
Ontario is 9 hours behind Grenoble.
What is the cheapest way to fly from GNB to ONT?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on GNB–ONT that never appear on search engines, with no booking fees.