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ONT to KTM: distance & flight time
Ontario (Ontario International Airport) → Kathmandu (Tribhuvan International Airport)
7,913 mi
12,735 km · 6,876 nm
15h 59m
estimated nonstop flight time
+12.8h
time difference · heading north
See live ONT→KTM fares Phone-only fares on this route — call free
Flight time details
7,913 miles nonstop takes roughly 15h 59m gate to gate, flying north. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 12.8-hour time gain when reading arrival times on your ticket.
The two airports
- ONT — Ontario International Airport · Ontario, United States
- 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 ONT
- CCB · Cable Airport6 mi away
- CNO · Chino Airport6 mi away
- LAX · Los Angeles International Airport47 mi away
- RAL · Riverside Municipal Airport11 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 ONT from KTM?
The flight distance from Ontario (ONT) to Kathmandu (KTM) is 7,913 miles (12,735 km, 6,876 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ONT to KTM?
A nonstop flight takes about 15h 59m 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 Ontario and Kathmandu?
Kathmandu is 12.8 hours ahead of Ontario.
What is the cheapest way to fly from ONT to KTM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ONT–KTM that never appear on search engines, with no booking fees.