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USN to IKA: distance & flight time
Ulsan (Ulsan Airport) → Tehran (Imam Khomeini International Airport)
4,269 mi
6,870 km · 3,709 nm
8h 50m
estimated nonstop flight time
-5.5h
time difference · heading northwest
See live USN→IKA fares Phone-only fares on this route — call free
Flight time details
4,269 miles nonstop takes roughly 8h 50m gate to gate, flying northwest. 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
- USN — Ulsan Airport · Ulsan, South Korea
- IKA — Imam Khomeini International Airport · Tehran, 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 USN
- KPO · Pohang Airport (G-815/K-3)28 mi away
- PUS · Gimhae International Airport37 mi away
- TAE · Daegu Airport44 mi away
- CHF · Jinhae Airbase/Airport (G-813/K-10)48 mi away
Near IKA
- THR · Mehrabad International Airport21 mi away
- PYK · Payam International Airport31 mi away
- GZW · Qazvin Airport84 mi away
- NSH · Noshahr Airport88 mi away
Frequently asked questions
How far is USN from IKA?
The flight distance from Ulsan (USN) to Tehran (IKA) is 4,269 miles (6,870 km, 3,709 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from USN to IKA?
A nonstop flight takes about 8h 50m 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 Ulsan and Tehran?
Tehran is 5.5 hours behind Ulsan.
What is the cheapest way to fly from USN to IKA?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on USN–IKA that never appear on search engines, with no booking fees.