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KOS to UBP: distance & flight time
Sihanoukville (Sihanoukville International Airport) → Ubon Ratchathani (Ubon Ratchathani Airport)
333 mi
536 km · 290 nm
1h 21m
estimated nonstop flight time
Same time
time difference · heading north
See live KOS→UBP fares Phone-only fares on this route — call free
Flight time details
333 miles nonstop takes roughly 1h 21m gate to gate, flying north. 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
- KOS — Sihanoukville International Airport · Sihanoukville, Cambodia
- UBP — Ubon Ratchathani Airport · Ubon Ratchathani, 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 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
Near UBP
- PKZ · Pakse International Airport61 mi away
- ZVK · Savannakhet Airport90 mi away
- ROI · Roi Et Airport94 mi away
- PXR · Surin Airport95 mi away
Frequently asked questions
How far is KOS from UBP?
The flight distance from Sihanoukville (KOS) to Ubon Ratchathani (UBP) is 333 miles (536 km, 290 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from KOS to UBP?
A nonstop flight takes about 1h 21m 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 KOS to UBP?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on KOS–UBP that never appear on search engines, with no booking fees.