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SYD to USM: distance & flight time
Sydney (Sydney Kingsford Smith International Airport) → Ko Samui (Samui Airport)
4,498 mi
7,240 km · 3,909 nm
9h 17m
estimated nonstop flight time
-3h
time difference · heading northwest
See live SYD→USM fares Phone-only fares on this route — call free
Flight time details
4,498 miles nonstop takes roughly 9h 17m 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
- SYD — Sydney Kingsford Smith International Airport · Sydney, 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 SYD
- BWU · Sydney Bankstown Airport11 mi away
- CDU · Camden Airport29 mi away
- XRH · RAAF Base Richmond33 mi away
- WOL · Wollongong Airport48 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 SYD from USM?
The flight distance from Sydney (SYD) to Ko Samui (USM) is 4,498 miles (7,240 km, 3,909 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SYD to USM?
A nonstop flight takes about 9h 17m 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 Sydney and Ko Samui?
Ko Samui is 3 hours behind Sydney.
What is the cheapest way to fly from SYD to USM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SYD–USM that never appear on search engines, with no booking fees.