Back to CalculatorRoute ID: USM-KTM
Flight Distance from Na Thon (Ko Samui Island) (USM) to Kathmandu (KTM)
Comprehensive aviation route data, direct distance, flight duration, CO₂ footprint, passport visa rules and interactive map.
Origin Airport
USMVTSM
Na Thon (Ko Samui Island), Thailand
Samui International Airport
Great Circle Path
2,539 km1,578 miles • 1,371 NM
Destination Airport
VNKTKTM
Kathmandu, Nepal
Tribhuvan International Airport
Direct Distance
2,539 km
1,578 Statute Miles
1,371 Nautical Miles
Commercial Flight
3h 29m
Est. non-stop flight duration (~850 km/h cruising speed + buffer)
CO₂ Footprint
229 kg
Estimated carbon footprint per economy passenger (~90g CO₂/km)
Initial Heading
325° True
Initial compass bearing towards destination
Estimated Travel Duration by Aircraft Class
Commercial Jet (Boeing 787 / A350)
3h 29m
Speed: ~850 km/h (459 knots)
Business Jet (Gulfstream G650)
3h 16m
Speed: ~920 km/h (496 knots)
Turboprop Aircraft (ATR-72 / Q400)
5h 23m
Speed: ~520 km/h (280 knots)
Passport & Visa Entry Requirements
🇹🇭 Thailand→🌐 NP
This information is provided for general guidance only and does not replace official verification with an embassy, consulate, or the IATA Travel Centre before you travel.
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Flight Path & Geodetic Arc Map
Great Circle Flight Arc Path
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Departure Airport Specs
Samui International Airport (USM)
- City / Country: Na Thon (Ko Samui Island), Thailand
- ICAO Code: VTSM
- Coordinates: 9.5478°, 100.0620°
- Timezone: Asia/Bangkok
- Elevation: 64 ft
Arrival Airport Specs
Tribhuvan International Airport (KTM)
- City / Country: Kathmandu, Nepal
- ICAO Code: VNKT
- Coordinates: 27.6966°, 85.3591°
- Timezone: Asia/Kathmandu
- Elevation: 4390 ft
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