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GKL to USM: distance & flight time
Great Keppel Island (Great Keppel Is Airport) → Ko Samui (Samui Airport)
4,115 mi
6,623 km · 3,576 nm
8h 32m
estimated nonstop flight time
-3h
time difference · heading northwest
See live GKL→USM fares Phone-only fares on this route — call free
Flight time details
4,115 miles nonstop takes roughly 8h 32m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 3-hour time set-back when reading arrival times on your ticket.
The two airports
- GKL — Great Keppel Is Airport · Great Keppel Island, Australia
- 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 GKL
- ROK · Rockhampton Airport33 mi away
- GLT · Gladstone Airport51 mi away
- THG · Thangool Airport93 mi away
- TDR · Theodore Airport136 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 GKL from USM?
The flight distance from Great Keppel Island (GKL) to Ko Samui (USM) is 4,115 miles (6,623 km, 3,576 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from GKL to USM?
A nonstop flight takes about 8h 32m 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 Great Keppel Island and Ko Samui?
Ko Samui is 3 hours behind Great Keppel Island.
What is the cheapest way to fly from GKL to USM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on GKL–USM that never appear on search engines, with no booking fees.