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ROI to USM: distance & flight time
Roi Et (Roi Et Airport) → Ko Samui (Samui Airport)
518 mi
834 km · 450 nm
1h 36m
estimated nonstop flight time
Same time
time difference · heading southwest
See live ROI→USM fares Phone-only fares on this route — call free
Flight time details
518 miles nonstop takes roughly 1h 36m gate to gate, flying southwest. Add 45–90 minutes per connection if there's no nonstop service. Both airports share the same local time, so schedules read exactly as flown.
The two airports
- ROI — Roi Et Airport · Roi Et, Thailand
- 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 ROI
- KKC · Khon Kaen Airport70 mi away
- BFV · Buri Ram Airport70 mi away
- ZVK · Savannakhet Airport72 mi away
- SNO · Sakon Nakhon Airport78 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 ROI from USM?
The flight distance from Roi Et (ROI) to Ko Samui (USM) is 518 miles (834 km, 450 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ROI to USM?
A nonstop flight takes about 1h 36m 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 cheapest way to fly from ROI to USM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ROI–USM that never appear on search engines, with no booking fees.