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KTM to ONT: distance & flight time
Kathmandu (Tribhuvan International Airport) → Ontario (Ontario International Airport)
7,913 mi
12,735 km · 6,876 nm
15h 59m
estimated nonstop flight time
-12.7h
time difference · heading north
See live KTM→ONT 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 12.7-hour time set-back when reading arrival times on your ticket.
The two airports
- KTM — Tribhuvan International Airport · Kathmandu, Nepal
- ONT — Ontario International Airport · Ontario, United States
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 KTM
- SIF · Simara Airport44 mi away
- RHP · Ramechhap Airport48 mi away
- BHR · Bharatpur Airport57 mi away
- MEY · Meghauli Airport70 mi away
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
Frequently asked questions
How far is KTM from ONT?
The flight distance from Kathmandu (KTM) to Ontario (ONT) 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 KTM to ONT?
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 Kathmandu and Ontario?
Ontario is 12.7 hours behind Kathmandu.
What is the cheapest way to fly from KTM to ONT?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on KTM–ONT that never appear on search engines, with no booking fees.