Need help booking?
Unpublished phone-only deals available
KOS to THR: distance & flight time
Sihanoukville (Sihanoukville International Airport) → Teheran (Mehrabad International Airport)
3,695 mi
5,947 km · 3,211 nm
7h 43m
estimated nonstop flight time
-3.5h
time difference · heading northwest
See live KOS→THR fares Phone-only fares on this route — call free
Flight time details
3,695 miles nonstop takes roughly 7h 43m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 3.5-hour time set-back when reading arrival times on your ticket.
The two airports
- KOS — Sihanoukville International Airport · Sihanoukville, Cambodia
- THR — Mehrabad International Airport · Teheran, 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 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
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
Frequently asked questions
How far is KOS from THR?
The flight distance from Sihanoukville (KOS) to Teheran (THR) 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 KOS to THR?
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.
What is the time difference between Sihanoukville and Teheran?
Teheran is 3.5 hours behind Sihanoukville.
What is the cheapest way to fly from KOS to THR?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on KOS–THR that never appear on search engines, with no booking fees.