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ISL to HLN: distance & flight time
Istanbul (Atatürk International Airport) → Helena (Helena Regional Airport)
5,923 mi
9,532 km · 5,147 nm
12h 5m
estimated nonstop flight time
-9h
time difference · heading northwest
See live ISL→HLN fares Phone-only fares on this route — call free
Flight time details
5,923 miles nonstop takes roughly 12h 5m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 9-hour time set-back when reading arrival times on your ticket.
The two airports
- ISL — Atatürk International Airport · Istanbul, Turkey
- HLN — Helena Regional Airport · Helena, United States
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 ISL
- IST · Istanbul Airport21 mi away
- SAW · Sabiha Gökçen International Airport26 mi away
- TEQ · Tekirdağ Çorlu Airport48 mi away
- BTZ · Bursa Airport52 mi away
Near HLN
- BTM · Bert Mooney Airport51 mi away
- GTF · Great Falls International Airport67 mi away
- BZN · Gallatin Field70 mi away
- LVM · Mission Field97 mi away
Frequently asked questions
How far is ISL from HLN?
The flight distance from Istanbul (ISL) to Helena (HLN) is 5,923 miles (9,532 km, 5,147 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ISL to HLN?
A nonstop flight takes about 12h 5m 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 Istanbul and Helena?
Helena is 9 hours behind Istanbul.
What is the cheapest way to fly from ISL to HLN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ISL–HLN that never appear on search engines, with no booking fees.