Seoul to Kathmandu
5h 21m The flight from Incheon International Airport (ICN) to Tribhuvan International Airport (KTM) covers 3,966 km (2,465 miles) and takes approximately 5h 21m gate to gate for a typical jet.
The route heads west on an initial great-circle bearing of 266°, passing near 34.3° N, 104.7° E at its midpoint.
The route
The great-circle path — the shortest line between the two airports across the curve of the earth. On a flat map it looks bent; on a globe it is straight.
Flight time at different cruise speeds
Aircraft type, winds and routing all move the real number. This is the same distance flown at different speeds, plus the 25-minute ground and climb allowance.
| Typical of | Cruise speed | Airborne | Gate to gate |
|---|---|---|---|
| Turboprop / regional | 550 km/h | 7h 13m | 7h 38m |
| Narrowbody jet (A320, 737) | 780 km/h | 5h 05m | 5h 30m |
| Widebody jet (777, 787, A350) | 900 km/h | 4h 24m | 4h 50m |
| Private jet (Gulfstream) | 850 km/h | 4h 40m | 5h 05m |
Headwinds on an eastbound long-haul routinely add 30–60 minutes; the same route westbound can be quicker. Airlines publish schedules with padding built in.
Both airports
| ICN | KTM | |
|---|---|---|
| Airport | Incheon International Airport | Tribhuvan International Airport |
| City | Seoul | Kathmandu |
| Country | South Korea | Nepal |
| ICAO | RKSI | VNKT |
| Coordinates | 37.4691, 126.451 | 27.6966, 85.3591 |
| Elevation | 23 ft | 4,390 ft |
Questions
How long is the flight from Seoul to Kathmandu?
A non-stop flight from Seoul (ICN) to Kathmandu (KTM) takes about 5h 21m. The great-circle distance is 3,966 km (2,465 miles, 2,142 nautical miles), flying west on an initial bearing of 266°.
How far is Seoul from Kathmandu?
3,966 kilometres in a straight line over the earth's surface — 2,465 miles or 2,142 nautical miles. Actual flown distance is usually 2–5% longer because aircraft follow airways, avoid weather and route around restricted airspace.
Is there a non-stop flight between ICN and KTM?
This page calculates the direct-line time and distance; it does not track airline schedules. At 3,966 km the route is comfortably within range of a non-stop service if an airline chooses to fly it. Check an airline or booking site for what is actually scheduled.
Airport coordinates from OurAirports (public domain). Distance is a great-circle calculation; flight time uses the model described on the method page. Flight times are great-circle estimates for planning only — always check the airline's published schedule.