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ISA to USM: distance & flight time
Mount Isa (Mount Isa Airport) → Ko Samui (Samui Airport)
3,395 mi
5,464 km · 2,950 nm
7h 7m
estimated nonstop flight time
-3h
time difference · heading northwest
See live ISA→USM fares Phone-only fares on this route — call free
Flight time details
3,395 miles nonstop takes roughly 7h 7m 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
- ISA — Mount Isa Airport · Mount Isa, 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 ISA
- CNJ · Cloncurry Airport66 mi away
- JCK · Julia Creek Airport144 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 ISA from USM?
The flight distance from Mount Isa (ISA) to Ko Samui (USM) is 3,395 miles (5,464 km, 2,950 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ISA to USM?
A nonstop flight takes about 7h 7m 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 Mount Isa and Ko Samui?
Ko Samui is 3 hours behind Mount Isa.
What is the cheapest way to fly from ISA to USM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ISA–USM that never appear on search engines, with no booking fees.