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SIR to KTM: distance & flight time
Sion (Sion Airport) → Kathmandu (Tribhuvan International Airport)
4,314 mi
6,944 km · 3,749 nm
8h 56m
estimated nonstop flight time
+3.8h
time difference · heading east
See live SIR→KTM fares Phone-only fares on this route — call free
Flight time details
4,314 miles nonstop takes roughly 8h 56m gate to gate, flying east. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 3.8-hour time gain when reading arrival times on your ticket.
The two airports
- SIR — Sion Airport · Sion, Switzerland
- KTM — Tribhuvan International Airport · Kathmandu, Nepal
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 SIR
- AOT · Aosta Airport33 mi away
- QLS · Lausanne-Blécherette Airport41 mi away
- ZIN · Interlaken Air Base41 mi away
- MVV · Megève Airport43 mi away
Near KTM
- SIF · Simara Airport44 mi away
- RHP · Ramechhap Airport48 mi away
- BHR · Bharatpur Airport57 mi away
- MEY · Meghauli Airport70 mi away
Frequently asked questions
How far is SIR from KTM?
The flight distance from Sion (SIR) to Kathmandu (KTM) is 4,314 miles (6,944 km, 3,749 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SIR to KTM?
A nonstop flight takes about 8h 56m 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 Sion and Kathmandu?
Kathmandu is 3.8 hours ahead of Sion.
What is the cheapest way to fly from SIR to KTM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SIR–KTM that never appear on search engines, with no booking fees.