Need help booking?
Unpublished phone-only deals available
GRS to ONO: distance & flight time
Grosseto (Grosseto Air Base) → Ontario (Ontario Municipal Airport)
5,638 mi
9,073 km · 4,899 nm
11h 31m
estimated nonstop flight time
-8h
time difference · heading northwest
See live GRS→ONO fares Phone-only fares on this route — call free
Flight time details
5,638 miles nonstop takes roughly 11h 31m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 8-hour time set-back when reading arrival times on your ticket.
The two airports
- GRS — Grosseto Air Base · Grosseto, Italy
- ONO — Ontario Municipal 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 GRS
- SAY · Siena-Ampugnano Airport36 mi away
- EBA · Marina Di Campo Airport42 mi away
- FCO · Leonardo da Vinci–Fiumicino Airport89 mi away
- PSA · Pisa International Airport72 mi away
Near ONO
- BOI · Boise Air Terminal/Gowen Field50 mi away
- BKE · Baker City Municipal Airport69 mi away
- MYL · McCall Municipal Airport75 mi away
- MUO · Mountain Home Air Force Base88 mi away
Frequently asked questions
How far is GRS from ONO?
The flight distance from Grosseto (GRS) to Ontario (ONO) is 5,638 miles (9,073 km, 4,899 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from GRS to ONO?
A nonstop flight takes about 11h 31m 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 Grosseto and Ontario?
Ontario is 8 hours behind Grosseto.
What is the cheapest way to fly from GRS to ONO?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on GRS–ONO that never appear on search engines, with no booking fees.