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SIN to USM: distance & flight time
Singapore (Singapore Changi Airport) → Ko Samui (Samui Airport)
628 mi
1,010 km · 545 nm
1h 50m
estimated nonstop flight time
-1h
time difference · heading northwest
See live SIN→USM fares Phone-only fares on this route — call free
Flight time details
628 miles nonstop takes roughly 1h 50m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time set-back when reading arrival times on your ticket.
The two airports
- SIN — Singapore Changi Airport · Singapore, Singapore
- 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 SIN
- QPG · Paya Lebar Air Base6 mi away
- XSP · Seletar Airport10 mi away
- BTH · Hang Nadim International Airport18 mi away
- TGA · Tengah Air Base20 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 SIN from USM?
The flight distance from Singapore (SIN) to Ko Samui (USM) is 628 miles (1,010 km, 545 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SIN to USM?
A nonstop flight takes about 1h 50m 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 Singapore and Ko Samui?
Ko Samui is 1 hour behind Singapore.
What is the cheapest way to fly from SIN to USM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SIN–USM that never appear on search engines, with no booking fees.