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IKA to USN: distance & flight time
Tehran (Imam Khomeini International Airport) → Ulsan (Ulsan Airport)
4,269 mi
6,870 km · 3,709 nm
8h 50m
estimated nonstop flight time
+5.5h
time difference · heading northeast
See live IKA→USN fares Phone-only fares on this route — call free
Flight time details
4,269 miles nonstop takes roughly 8h 50m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 5.5-hour time gain when reading arrival times on your ticket.
The two airports
- IKA — Imam Khomeini International Airport · Tehran, Iran
- USN — Ulsan Airport · Ulsan, South Korea
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 IKA
- THR · Mehrabad International Airport21 mi away
- PYK · Payam International Airport31 mi away
- GZW · Qazvin Airport84 mi away
- NSH · Noshahr Airport88 mi away
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
Frequently asked questions
How far is IKA from USN?
The flight distance from Tehran (IKA) to Ulsan (USN) 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 IKA to USN?
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 Tehran and Ulsan?
Ulsan is 5.5 hours ahead of Tehran.
What is the cheapest way to fly from IKA to USN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on IKA–USN that never appear on search engines, with no booking fees.