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ONO to KSO: distance & flight time
Ontario (Ontario Municipal Airport) → Kastoria (Kastoria National Airport)
6,051 mi
9,738 km · 5,258 nm
12h 20m
estimated nonstop flight time
+9h
time difference · heading northeast
See live ONO→KSO fares Phone-only fares on this route — call free
Flight time details
6,051 miles nonstop takes roughly 12h 20m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 9-hour time gain when reading arrival times on your ticket.
The two airports
- ONO — Ontario Municipal Airport · Ontario, United States
- KSO — Kastoria National Airport · Kastoria, Greece
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 ONO
- BOI · Boise Air Terminal/Gowen Field50 mi away
- BKE · Baker City Municipal Airport69 mi away
- MYL · McCall Municipal Airport75 mi away
- MUO · Mountain Home Air Force Base88 mi away
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
Frequently asked questions
How far is ONO from KSO?
The flight distance from Ontario (ONO) to Kastoria (KSO) is 6,051 miles (9,738 km, 5,258 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ONO to KSO?
A nonstop flight takes about 12h 20m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
Are there nonstop flights from ONO to KSO?
Nonstop service on ONO–KSO depends on the season and the day of week. Run the fare search on this page with the nonstop filter applied to see current direct options; when there is no nonstop, a single connection through a carrier hub adds roughly 2–4 hours to the 12h 20m nonstop estimate.
What is the time difference between Ontario and Kastoria?
Kastoria is 9 hours ahead of Ontario.
What is the cheapest way to fly from ONO to KSO?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ONO–KSO that never appear on search engines, with no booking fees.
Why are some ONO to KSO fares phone-only?
Consolidator contracts let us sell certain ONO–KSO tickets below the price airlines permit us to publish online, so those fares can only be quoted over the phone. Call the travel desk and an agent will check phone-only inventory for your dates.