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KSO to ONT: distance & flight time
Kastoria (Kastoria National Airport) → Ontario (Ontario International Airport)
6,662 mi
10,721 km · 5,789 nm
13h 32m
estimated nonstop flight time
-10h
time difference · heading northwest
See live KSO→ONT fares Phone-only fares on this route — call free
Flight time details
6,662 miles nonstop takes roughly 13h 32m gate to gate, flying northwest. 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
- KSO — Kastoria National Airport · Kastoria, Greece
- 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 KSO
- KZI · Filippos Airport31 mi away
- IOA · Ioannina Airport57 mi away
- OHD · Ohrid St. Paul the Apostle Airport58 mi away
- LRA · Larisa Airport83 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 KSO from ONT?
The flight distance from Kastoria (KSO) to Ontario (ONT) is 6,662 miles (10,721 km, 5,789 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from KSO to ONT?
A nonstop flight takes about 13h 32m 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 Kastoria and Ontario?
Ontario is 10 hours behind Kastoria.
What is the cheapest way to fly from KSO to ONT?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on KSO–ONT that never appear on search engines, with no booking fees.