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ACI to ONT: distance & flight time
Alderney (Alderney Airport) → Ontario (Ontario International Airport)
5,432 mi
8,741 km · 4,720 nm
11h 7m
estimated nonstop flight time
-8h
time difference · heading northwest
See live ACI→ONT fares Phone-only fares on this route — call free
Flight time details
5,432 miles nonstop takes roughly 11h 7m 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
- ACI — Alderney Airport · Alderney, Guernsey
- 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 ACI
- GCI · Guernsey Airport26 mi away
- JER · Jersey Airport34 mi away
- CER · Cherbourg-Maupertus Airport34 mi away
- GFR · Granville Airport64 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 ACI from ONT?
The flight distance from Alderney (ACI) to Ontario (ONT) is 5,432 miles (8,741 km, 4,720 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ACI to ONT?
A nonstop flight takes about 11h 7m 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 Alderney and Ontario?
Ontario is 8 hours behind Alderney.
What is the cheapest way to fly from ACI to ONT?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ACI–ONT that never appear on search engines, with no booking fees.