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CYI to HLN: distance & flight time
Chiayi (Chiayi Airport) → Helena (Helena Regional Airport)
6,597 mi
10,616 km · 5,732 nm
13h 24m
estimated nonstop flight time
-14h
time difference · heading northeast
See live CYI→HLN fares Phone-only fares on this route — call free
Flight time details
6,597 miles nonstop takes roughly 13h 24m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 14-hour time set-back when reading arrival times on your ticket.
The two airports
- CYI — Chiayi Airport · Chiayi, Taiwan
- 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 CYI
- TNN · Tainan Airport37 mi away
- MZG · Makung Airport49 mi away
- PIF · Pingtung North Airport53 mi away
- TXG · Taichung Airport53 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 CYI from HLN?
The flight distance from Chiayi (CYI) to Helena (HLN) is 6,597 miles (10,616 km, 5,732 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from CYI to HLN?
A nonstop flight takes about 13h 24m 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 Chiayi and Helena?
Helena is 14 hours behind Chiayi.
What is the cheapest way to fly from CYI to HLN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on CYI–HLN that never appear on search engines, with no booking fees.