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GRS to OSN: distance & flight time
Grosseto (Grosseto Air Base) → Osan (Osan Air Base)
5,610 mi
9,028 km · 4,875 nm
11h 28m
estimated nonstop flight time
+7h
time difference · heading northeast
See live GRS→OSN fares Phone-only fares on this route — call free
Flight time details
5,610 miles nonstop takes roughly 11h 28m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 7-hour time gain when reading arrival times on your ticket.
The two airports
- GRS — Grosseto Air Base · Grosseto, Italy
- OSN — Osan Air Base · Osan, South Korea
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 GRS
- SAY · Siena-Ampugnano Airport36 mi away
- EBA · Marina Di Campo Airport42 mi away
- FCO · Leonardo da Vinci–Fiumicino Airport89 mi away
- PSA · Pisa International Airport72 mi away
Near OSN
- ICN · Incheon International Airport41 mi away
- SWU · Suwon Airport10 mi away
- SSN · Seoul Air Base (K-16)25 mi away
- GMP · Gimpo International Airport35 mi away
Frequently asked questions
How far is GRS from OSN?
The flight distance from Grosseto (GRS) to Osan (OSN) is 5,610 miles (9,028 km, 4,875 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from GRS to OSN?
A nonstop flight takes about 11h 28m 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 Grosseto and Osan?
Osan is 7 hours ahead of Grosseto.
What is the cheapest way to fly from GRS to OSN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on GRS–OSN that never appear on search engines, with no booking fees.