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GCH to KOS: distance & flight time
Gachsaran (Gachsaran Airport) → Sihanoukville (Sihanoukville International Airport)
3,643 mi
5,863 km · 3,166 nm
7h 37m
estimated nonstop flight time
+3.5h
time difference · heading east
See live GCH→KOS fares Phone-only fares on this route — call free
Flight time details
3,643 miles nonstop takes roughly 7h 37m gate to gate, flying east. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 3.5-hour time gain when reading arrival times on your ticket.
The two airports
- GCH — Gachsaran Airport · Gachsaran, Iran
- KOS — Sihanoukville International Airport · Sihanoukville, Cambodia
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 GCH
- YES · Yasouj Airport50 mi away
- AKW · Aghajari Airport74 mi away
- KHK · Khark Island Airport80 mi away
- OMI · Omidiyeh Airport84 mi away
Near KOS
- PQC · Phu Quoc International Airport37 mi away
- PNH · Phnom Penh International Airport106 mi away
- VKG · Rach Gia Airport110 mi away
- KZC · Kampong Chhnang Airport132 mi away
Frequently asked questions
How far is GCH from KOS?
The flight distance from Gachsaran (GCH) to Sihanoukville (KOS) is 3,643 miles (5,863 km, 3,166 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from GCH to KOS?
A nonstop flight takes about 7h 37m 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 GCH to KOS?
Nonstop service on GCH–KOS 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 7h 37m nonstop estimate.
What is the time difference between Gachsaran and Sihanoukville?
Sihanoukville is 3.5 hours ahead of Gachsaran.
What is the cheapest way to fly from GCH to KOS?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on GCH–KOS that never appear on search engines, with no booking fees.
Why are some GCH to KOS fares phone-only?
Consolidator contracts let us sell certain GCH–KOS 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.