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OIR to HLN: distance & flight time
Okushiri (Okushiri Airport) → Helena (Helena Regional Airport)
4,911 mi
7,903 km · 4,267 nm
10h 6m
estimated nonstop flight time
-15h
time difference · heading northeast
See live OIR→HLN fares Phone-only fares on this route — call free
Flight time details
4,911 miles nonstop takes roughly 10h 6m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 15-hour time set-back when reading arrival times on your ticket.
The two airports
- OIR — Okushiri Airport · Okushiri, Japan
- 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 OIR
- HKD · Hakodate Airport74 mi away
- AOJ · Aomori Airport113 mi away
- OKD · Okadama Airport123 mi away
- CTS · New Chitose Airport125 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 OIR from HLN?
The flight distance from Okushiri (OIR) to Helena (HLN) is 4,911 miles (7,903 km, 4,267 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from OIR to HLN?
A nonstop flight takes about 10h 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 Okushiri and Helena?
Helena is 15 hours behind Okushiri.
What is the cheapest way to fly from OIR to HLN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on OIR–HLN that never appear on search engines, with no booking fees.