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OKO to HLN: distance & flight time
Yokota (Yokota Air Base) → Helena (Helena Regional Airport)
5,234 mi
8,424 km · 4,548 nm
10h 44m
estimated nonstop flight time
-15h
time difference · heading northeast
See live OKO→HLN fares Phone-only fares on this route — call free
Flight time details
5,234 miles nonstop takes roughly 10h 44m 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
- OKO — Yokota Air Base · Yokota, 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 OKO
- HND · Tokyo Haneda International Airport28 mi away
- NRT · Narita International Airport58 mi away
- NJA · Atsugi Naval Air Facility21 mi away
- IBR · Hyakuri Airport67 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 OKO from HLN?
The flight distance from Yokota (OKO) to Helena (HLN) is 5,234 miles (8,424 km, 4,548 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from OKO to HLN?
A nonstop flight takes about 10h 44m 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 Yokota and Helena?
Helena is 15 hours behind Yokota.
What is the cheapest way to fly from OKO to HLN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on OKO–HLN that never appear on search engines, with no booking fees.