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ONT to UNI: distance & flight time
Ontario (Ontario International Airport) → Union Island (Union Island International Airport)
3,807 mi
6,127 km · 3,309 nm
7h 56m
estimated nonstop flight time
+3h
time difference · heading east
See live ONT→UNI fares Phone-only fares on this route — call free
Flight time details
3,807 miles nonstop takes roughly 7h 56m gate to gate, flying east. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 3-hour time gain when reading arrival times on your ticket.
The two airports
- ONT — Ontario International Airport · Ontario, United States
- UNI — Union Island International Airport · Union Island, Saint Vincent and the Grenadines
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 ONT
- CCB · Cable Airport6 mi away
- CNO · Chino Airport6 mi away
- LAX · Los Angeles International Airport47 mi away
- RAL · Riverside Municipal Airport11 mi away
Near UNI
- CIW · Canouan Airport8 mi away
- MQS · Mustique Airport25 mi away
- BQU · J F Mitchell Airport29 mi away
- SVD · Argyle International Airport42 mi away
Frequently asked questions
How far is ONT from UNI?
The flight distance from Ontario (ONT) to Union Island (UNI) is 3,807 miles (6,127 km, 3,309 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ONT to UNI?
A nonstop flight takes about 7h 56m 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 Ontario and Union Island?
Union Island is 3 hours ahead of Ontario.
What is the cheapest way to fly from ONT to UNI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ONT–UNI that never appear on search engines, with no booking fees.