Need help booking?
Unpublished phone-only deals available
ROI to KOS: distance & flight time
Roi Et (Roi Et Airport) → Sihanoukville (Sihanoukville International Airport)
383 mi
616 km · 333 nm
1h 28m
estimated nonstop flight time
Same time
time difference · heading south
See live ROI→KOS fares Phone-only fares on this route — call free
Flight time details
383 miles nonstop takes roughly 1h 28m gate to gate, flying south. 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
- KOS — Sihanoukville International Airport · Sihanoukville, Cambodia
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 KOS
- PQC · Phu Quoc International Airport37 mi away
- PNH · Phnom Penh International Airport106 mi away
- VKG · Rach Gia Airport110 mi away
- KZC · Kampong Chhnang Airport132 mi away
Frequently asked questions
How far is ROI from KOS?
The flight distance from Roi Et (ROI) to Sihanoukville (KOS) is 383 miles (616 km, 333 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ROI to KOS?
A nonstop flight takes about 1h 28m 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 KOS?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ROI–KOS that never appear on search engines, with no booking fees.