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OSN to GCH: distance & flight time
Osan (Osan Air Base) → Gachsaran (Gachsaran Airport)
4,287 mi
6,899 km · 3,725 nm
8h 52m
estimated nonstop flight time
-5.5h
time difference · heading west
See live OSN→GCH fares Phone-only fares on this route — call free
Flight time details
4,287 miles nonstop takes roughly 8h 52m gate to gate, flying west. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 5.5-hour time set-back when reading arrival times on your ticket.
The two airports
- OSN — Osan Air Base · Osan, South Korea
- GCH — Gachsaran Airport · Gachsaran, Iran
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 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
Near GCH
- YES · Yasouj Airport50 mi away
- AKW · Aghajari Airport74 mi away
- KHK · Khark Island Airport80 mi away
- OMI · Omidiyeh Airport84 mi away
Frequently asked questions
How far is OSN from GCH?
The flight distance from Osan (OSN) to Gachsaran (GCH) is 4,287 miles (6,899 km, 3,725 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from OSN to GCH?
A nonstop flight takes about 8h 52m 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 Osan and Gachsaran?
Gachsaran is 5.5 hours behind Osan.
What is the cheapest way to fly from OSN to GCH?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on OSN–GCH that never appear on search engines, with no booking fees.