Need help booking?
Unpublished phone-only deals available
KEP to USM: distance & flight time
Nepalgunj (Nepalgunj Airport) → Ko Samui (Samui Airport)
1,753 mi
2,821 km · 1,523 nm
3h 54m
estimated nonstop flight time
+1.3h
time difference · heading southeast
See live KEP→USM fares Phone-only fares on this route — call free
Flight time details
1,753 miles nonstop takes roughly 3h 54m gate to gate, flying southeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1.3-hour time gain when reading arrival times on your ticket.
The two airports
- KEP — Nepalgunj Airport · Nepalgunj, Nepal
- 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 KEP
- SKH · Surkhet Airport33 mi away
- DNP · Tulsipur Airport38 mi away
- RUK · Rukum Chaurjahari Airport48 mi away
- DHI · Dhangarhi Airport80 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 KEP from USM?
The flight distance from Nepalgunj (KEP) to Ko Samui (USM) is 1,753 miles (2,821 km, 1,523 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from KEP to USM?
A nonstop flight takes about 3h 54m 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 Nepalgunj and Ko Samui?
Ko Samui is 1.3 hours ahead of Nepalgunj.
What is the cheapest way to fly from KEP to USM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on KEP–USM that never appear on search engines, with no booking fees.