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KLU to ONT: distance & flight time
Klagenfurt (Klagenfurt Airport) → Ontario (Ontario International Airport)
6,111 mi
9,835 km · 5,311 nm
12h 27m
estimated nonstop flight time
-9h
time difference · heading northwest
See live KLU→ONT fares Phone-only fares on this route — call free
Flight time details
6,111 miles nonstop takes roughly 12h 27m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 9-hour time set-back when reading arrival times on your ticket.
The two airports
- KLU — Klagenfurt Airport · Klagenfurt, Austria
- 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 KLU
- LJU · Ljubljana Jože Pučnik Airport29 mi away
- GRZ · Graz Airport57 mi away
- MBX · Maribor Airport65 mi away
- TRS · Trieste–Friuli Venezia Giulia 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 KLU from ONT?
The flight distance from Klagenfurt (KLU) to Ontario (ONT) is 6,111 miles (9,835 km, 5,311 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from KLU to ONT?
A nonstop flight takes about 12h 27m 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 Klagenfurt and Ontario?
Ontario is 9 hours behind Klagenfurt.
What is the cheapest way to fly from KLU to ONT?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on KLU–ONT that never appear on search engines, with no booking fees.