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ACH to USM: distance & flight time
Altenrhein (St Gallen Altenrhein Airport) → Ko Samui (Samui Airport)
5,756 mi
9,264 km · 5,002 nm
11h 45m
estimated nonstop flight time
+5h
time difference · heading east
See live ACH→USM fares Phone-only fares on this route — call free
Flight time details
5,756 miles nonstop takes roughly 11h 45m gate to gate, flying east. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 5-hour time gain when reading arrival times on your ticket.
The two airports
- ACH — St Gallen Altenrhein Airport · Altenrhein, Switzerland
- 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 ACH
- HOH · Hohenems-Dornbirn Airport9 mi away
- FDH · Friedrichshafen Airport13 mi away
- ZRH · Zürich Airport47 mi away
- FMM · Memmingen Allgau Airport47 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 ACH from USM?
The flight distance from Altenrhein (ACH) to Ko Samui (USM) is 5,756 miles (9,264 km, 5,002 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ACH to USM?
A nonstop flight takes about 11h 45m 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 Altenrhein and Ko Samui?
Ko Samui is 5 hours ahead of Altenrhein.
What is the cheapest way to fly from ACH to USM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ACH–USM that never appear on search engines, with no booking fees.