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ACI to UNI: distance & flight time
Alderney (Alderney Airport) → Union Island (Union Island International Airport)
4,193 mi
6,748 km · 3,644 nm
8h 41m
estimated nonstop flight time
-5h
time difference · heading west
See live ACI→UNI fares Phone-only fares on this route — call free
Flight time details
4,193 miles nonstop takes roughly 8h 41m gate to gate, flying west. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 5-hour time set-back when reading arrival times on your ticket.
The two airports
- ACI — Alderney Airport · Alderney, Guernsey
- 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 ACI
- GCI · Guernsey Airport26 mi away
- JER · Jersey Airport34 mi away
- CER · Cherbourg-Maupertus Airport34 mi away
- GFR · Granville Airport64 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 ACI from UNI?
The flight distance from Alderney (ACI) to Union Island (UNI) is 4,193 miles (6,748 km, 3,644 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ACI to UNI?
A nonstop flight takes about 8h 41m 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 Union Island?
Union Island is 5 hours behind Alderney.
What is the cheapest way to fly from ACI to UNI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ACI–UNI that never appear on search engines, with no booking fees.