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ISN to THR: distance & flight time
Williston (Sloulin Field International Airport) → Teheran (Mehrabad International Airport)
6,440 mi
10,364 km · 5,596 nm
13h 6m
estimated nonstop flight time
+8.5h
time difference · heading north
See live ISN→THR fares Phone-only fares on this route — call free
Flight time details
6,440 miles nonstop takes roughly 13h 6m gate to gate, flying north. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 8.5-hour time gain when reading arrival times on your ticket.
The two airports
- ISN — Sloulin Field International Airport · Williston, United States
- 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 ISN
- SDY · Sidney - Richland Regional Airport41 mi away
- YEN · Estevan Airport78 mi away
- OLF · L M Clayton Airport89 mi away
- GDV · Dawson Community Airport90 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 ISN from THR?
The flight distance from Williston (ISN) to Teheran (THR) is 6,440 miles (10,364 km, 5,596 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ISN to THR?
A nonstop flight takes about 13h 6m 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 Williston and Teheran?
Teheran is 8.5 hours ahead of Williston.
What is the cheapest way to fly from ISN to THR?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ISN–THR that never appear on search engines, with no booking fees.