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HLN to CYI: distance & flight time
Helena (Helena Regional Airport) → Chiayi (Chiayi Airport)
6,597 mi
10,616 km · 5,732 nm
13h 24m
estimated nonstop flight time
+14h
time difference · heading northwest
See live HLN→CYI fares Phone-only fares on this route — call free
Flight time details
6,597 miles nonstop takes roughly 13h 24m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 14-hour time gain when reading arrival times on your ticket.
The two airports
- HLN — Helena Regional Airport · Helena, United States
- CYI — Chiayi Airport · Chiayi, Taiwan
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 HLN
- BTM · Bert Mooney Airport51 mi away
- GTF · Great Falls International Airport67 mi away
- BZN · Gallatin Field70 mi away
- LVM · Mission Field97 mi away
Near CYI
- TNN · Tainan Airport37 mi away
- MZG · Makung Airport49 mi away
- PIF · Pingtung North Airport53 mi away
- TXG · Taichung Airport53 mi away
Frequently asked questions
How far is HLN from CYI?
The flight distance from Helena (HLN) to Chiayi (CYI) 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 HLN to CYI?
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 Helena and Chiayi?
Chiayi is 14 hours ahead of Helena.
What is the cheapest way to fly from HLN to CYI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on HLN–CYI that never appear on search engines, with no booking fees.