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USN to THR: distance & flight time
Ulsan (Ulsan Airport) → Teheran (Mehrabad International Airport)
4,253 mi
6,844 km · 3,695 nm
8h 48m
estimated nonstop flight time
-5.5h
time difference · heading northwest
See live USN→THR fares Phone-only fares on this route — call free
Flight time details
4,253 miles nonstop takes roughly 8h 48m 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
- 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 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 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 USN from THR?
The flight distance from Ulsan (USN) to Teheran (THR) is 4,253 miles (6,844 km, 3,695 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from USN to THR?
A nonstop flight takes about 8h 48m 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 Teheran?
Teheran is 5.5 hours behind Ulsan.
What is the cheapest way to fly from USN to THR?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on USN–THR that never appear on search engines, with no booking fees.