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STJ to USM: distance & flight time
Rosecrans (Rosecrans Memorial Airport) → Ko Samui (Samui Airport)
8,897 mi
14,318 km · 7,731 nm
17h 55m
estimated nonstop flight time
+12h
time difference · heading north
See live STJ→USM fares Phone-only fares on this route — call free
Flight time details
8,897 miles nonstop takes roughly 17h 55m gate to gate, flying north. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 12-hour time gain when reading arrival times on your ticket.
The two airports
- STJ — Rosecrans Memorial Airport · Rosecrans, United States
- 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 STJ
- FLV · Sherman Army Air Field28 mi away
- MCI · Kansas City International Airport34 mi away
- MKC · Charles B. Wheeler Downtown Airport48 mi away
- LWC · Lawrence Municipal Airport55 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 STJ from USM?
The flight distance from Rosecrans (STJ) to Ko Samui (USM) is 8,897 miles (14,318 km, 7,731 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from STJ to USM?
A nonstop flight takes about 17h 55m 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 Rosecrans and Ko Samui?
Ko Samui is 12 hours ahead of Rosecrans.
What is the cheapest way to fly from STJ to USM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on STJ–USM that never appear on search engines, with no booking fees.