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GCI to KOS: distance & flight time
Guernsey (Guernsey Airport) → Sihanoukville (Sihanoukville International Airport)
6,374 mi
10,258 km · 5,539 nm
12h 58m
estimated nonstop flight time
+6h
time difference · heading east
See live GCI→KOS fares Phone-only fares on this route — call free
Flight time details
6,374 miles nonstop takes roughly 12h 58m 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
- GCI — Guernsey Airport · Guernsey, Guernsey
- KOS — Sihanoukville International Airport · Sihanoukville, Cambodia
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 GCI
- JER · Jersey Airport24 mi away
- ACI · Alderney Airport26 mi away
- CER · Cherbourg-Maupertus Airport53 mi away
- GFR · Granville Airport60 mi away
Near KOS
- PQC · Phu Quoc International Airport37 mi away
- PNH · Phnom Penh International Airport106 mi away
- VKG · Rach Gia Airport110 mi away
- KZC · Kampong Chhnang Airport132 mi away
Frequently asked questions
How far is GCI from KOS?
The flight distance from Guernsey (GCI) to Sihanoukville (KOS) is 6,374 miles (10,258 km, 5,539 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from GCI to KOS?
A nonstop flight takes about 12h 58m 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 Guernsey and Sihanoukville?
Sihanoukville is 6 hours ahead of Guernsey.
What is the cheapest way to fly from GCI to KOS?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on GCI–KOS that never appear on search engines, with no booking fees.