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THR to KOS: distance & flight time
Teheran (Mehrabad International Airport) → Sihanoukville (Sihanoukville International Airport)
3,695 mi
5,947 km · 3,211 nm
7h 43m
estimated nonstop flight time
+3.5h
time difference · heading east
See live THR→KOS fares Phone-only fares on this route — call free
Flight time details
3,695 miles nonstop takes roughly 7h 43m 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
- THR — Mehrabad International Airport · Teheran, 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 THR
- IKA · Imam Khomeini International Airport21 mi away
- PYK · Payam International Airport28 mi away
- NSH · Noshahr Airport68 mi away
- GZW · Qazvin Airport80 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 THR from KOS?
The flight distance from Teheran (THR) to Sihanoukville (KOS) is 3,695 miles (5,947 km, 3,211 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from THR to KOS?
A nonstop flight takes about 7h 43m 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 THR to KOS?
Nonstop service on THR–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 43m nonstop estimate.
What is the time difference between Teheran and Sihanoukville?
Sihanoukville is 3.5 hours ahead of Teheran.
What is the cheapest way to fly from THR to KOS?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on THR–KOS that never appear on search engines, with no booking fees.
Why are some THR to KOS fares phone-only?
Consolidator contracts let us sell certain THR–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.