Need help booking?
Unpublished phone-only deals available
USM to SIN: distance & flight time
Ko Samui (Samui Airport) → Singapore (Singapore Changi Airport)
628 mi
1,010 km · 545 nm
1h 50m
estimated nonstop flight time
+1h
time difference · heading southeast
See live USM→SIN fares Phone-only fares on this route — call free
Flight time details
628 miles nonstop takes roughly 1h 50m gate to gate, flying southeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time gain when reading arrival times on your ticket.
The two airports
- USM — Samui Airport · Ko Samui, Thailand
- SIN — Singapore Changi Airport · Singapore, Singapore
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 USM
- URT · Surat Thani Airport69 mi away
- NST · Nakhon Si Thammarat Airport70 mi away
- CJM · Chumphon Airport93 mi away
- UNN · Ranong Airport102 mi away
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
Frequently asked questions
How far is USM from SIN?
The flight distance from Ko Samui (USM) to Singapore (SIN) is 628 miles (1,010 km, 545 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from USM to SIN?
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.
Are there nonstop flights from USM to SIN?
Nonstop service on USM–SIN depends on the season and the day of week. Run the fare search on this page with the nonstop filter applied to see current direct options; when there is no nonstop, a single connection through a carrier hub adds roughly 2–4 hours to the 1h 50m nonstop estimate.
What is the time difference between Ko Samui and Singapore?
Singapore is 1 hour ahead of Ko Samui.
What is the cheapest way to fly from USM to SIN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on USM–SIN that never appear on search engines, with no booking fees.
Why are some USM to SIN fares phone-only?
Consolidator contracts let us sell certain USM–SIN tickets below the price airlines permit us to publish online, so those fares can only be quoted over the phone. Call the travel desk and an agent will check phone-only inventory for your dates.