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ACI to USM: distance & flight time
Alderney (Alderney Airport) → Ko Samui (Samui Airport)
6,254 mi
10,065 km · 5,435 nm
12h 44m
estimated nonstop flight time
+6h
time difference · heading east
See live ACI→USM fares Phone-only fares on this route — call free
Flight time details
6,254 miles nonstop takes roughly 12h 44m gate to gate, flying east. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 6-hour time gain when reading arrival times on your ticket.
The two airports
- ACI — Alderney Airport · Alderney, Guernsey
- USM — Samui Airport · Ko Samui, Thailand
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 USM
- URT · Surat Thani Airport69 mi away
- NST · Nakhon Si Thammarat Airport70 mi away
- CJM · Chumphon Airport93 mi away
- UNN · Ranong Airport102 mi away
Frequently asked questions
How far is ACI from USM?
The flight distance from Alderney (ACI) to Ko Samui (USM) is 6,254 miles (10,065 km, 5,435 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ACI to USM?
A nonstop flight takes about 12h 44m 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 Ko Samui?
Ko Samui is 6 hours ahead of Alderney.
What is the cheapest way to fly from ACI to USM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ACI–USM that never appear on search engines, with no booking fees.