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KSO to UNI: distance & flight time
Kastoria (Kastoria National Airport) → Union Island (Union Island International Airport)
5,275 mi
8,490 km · 4,584 nm
10h 49m
estimated nonstop flight time
-7h
time difference · heading west
See live KSO→UNI fares Phone-only fares on this route — call free
Flight time details
5,275 miles nonstop takes roughly 10h 49m gate to gate, flying west. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 7-hour time set-back when reading arrival times on your ticket.
The two airports
- KSO — Kastoria National Airport · Kastoria, Greece
- UNI — Union Island International Airport · Union Island, Saint Vincent and the Grenadines
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 UNI
- CIW · Canouan Airport8 mi away
- MQS · Mustique Airport25 mi away
- BQU · J F Mitchell Airport29 mi away
- SVD · Argyle International Airport42 mi away
Frequently asked questions
How far is KSO from UNI?
The flight distance from Kastoria (KSO) to Union Island (UNI) is 5,275 miles (8,490 km, 4,584 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from KSO to UNI?
A nonstop flight takes about 10h 49m 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 Union Island?
Union Island is 7 hours behind Kastoria.
What is the cheapest way to fly from KSO to UNI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on KSO–UNI that never appear on search engines, with no booking fees.