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KLF to ONT: distance & flight time
Kaluga (Grabtsevo Airport) → Ontario (Ontario International Airport)
6,122 mi
9,852 km · 5,320 nm
12h 28m
estimated nonstop flight time
-10h
time difference · heading north
See live KLF→ONT fares Phone-only fares on this route — call free
Flight time details
6,122 miles nonstop takes roughly 12h 28m gate to gate, flying north. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 10-hour time set-back when reading arrival times on your ticket.
The two airports
- KLF — Grabtsevo Airport · Kaluga, Russia
- 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 KLF
- VKO · Vnukovo International Airport80 mi away
- OSF · Ostafyevo International Airport80 mi away
- DME · Domodedovo International Airport85 mi away
- ZIA · Zhukovsky International Airport99 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 KLF from ONT?
The flight distance from Kaluga (KLF) to Ontario (ONT) is 6,122 miles (9,852 km, 5,320 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from KLF to ONT?
A nonstop flight takes about 12h 28m 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 Kaluga and Ontario?
Ontario is 10 hours behind Kaluga.
What is the cheapest way to fly from KLF to ONT?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on KLF–ONT that never appear on search engines, with no booking fees.