Need help booking?
Unpublished phone-only deals available
GRM to KSO: distance & flight time
Grand Marais (Grand Marais Cook County Airport) → Kastoria (Kastoria National Airport)
5,044 mi
8,118 km · 4,383 nm
10h 21m
estimated nonstop flight time
+8h
time difference · heading northeast
See live GRM→KSO fares Phone-only fares on this route — call free
Flight time details
5,044 miles nonstop takes roughly 10h 21m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 8-hour time gain when reading arrival times on your ticket.
The two airports
- GRM — Grand Marais Cook County Airport · Grand Marais, 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 GRM
- YQT · Thunder Bay Airport61 mi away
- LYU · Ely Municipal Airport67 mi away
- YIB · Atikokan Municipal Airport87 mi away
- CMX · Houghton County Memorial Airport100 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 GRM from KSO?
The flight distance from Grand Marais (GRM) to Kastoria (KSO) is 5,044 miles (8,118 km, 4,383 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from GRM to KSO?
A nonstop flight takes about 10h 21m 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 Grand Marais and Kastoria?
Kastoria is 8 hours ahead of Grand Marais.
What is the cheapest way to fly from GRM to KSO?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on GRM–KSO that never appear on search engines, with no booking fees.