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USM to OSN: distance & flight time
Ko Samui (Samui Airport) → Osan (Osan Air Base)
2,540 mi
4,088 km · 2,207 nm
5h 27m
estimated nonstop flight time
+2h
time difference · heading northeast
See live USM→OSN fares Phone-only fares on this route — call free
Flight time details
2,540 miles nonstop takes roughly 5h 27m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 2-hour time gain when reading arrival times on your ticket.
The two airports
- USM — Samui Airport · Ko Samui, Thailand
- OSN — Osan Air Base · Osan, South Korea
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 OSN
- ICN · Incheon International Airport41 mi away
- SWU · Suwon Airport10 mi away
- SSN · Seoul Air Base (K-16)25 mi away
- GMP · Gimpo International Airport35 mi away
Frequently asked questions
How far is USM from OSN?
The flight distance from Ko Samui (USM) to Osan (OSN) is 2,540 miles (4,088 km, 2,207 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from USM to OSN?
A nonstop flight takes about 5h 27m 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 Ko Samui and Osan?
Osan is 2 hours ahead of Ko Samui.
What is the cheapest way to fly from USM to OSN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on USM–OSN that never appear on search engines, with no booking fees.