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HLN to ACH: distance & flight time
Helena (Helena Regional Airport) → Altenrhein (St Gallen Altenrhein Airport)
5,042 mi
8,115 km · 4,382 nm
10h 21m
estimated nonstop flight time
+8h
time difference · heading northeast
See live HLN→ACH fares Phone-only fares on this route — call free
Flight time details
5,042 miles nonstop takes roughly 10h 21m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 8-hour time gain when reading arrival times on your ticket.
The two airports
- HLN — Helena Regional Airport · Helena, United States
- ACH — St Gallen Altenrhein Airport · Altenrhein, Switzerland
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 ACH
- HOH · Hohenems-Dornbirn Airport9 mi away
- FDH · Friedrichshafen Airport13 mi away
- ZRH · Zürich Airport47 mi away
- FMM · Memmingen Allgau Airport47 mi away
Frequently asked questions
How far is HLN from ACH?
The flight distance from Helena (HLN) to Altenrhein (ACH) is 5,042 miles (8,115 km, 4,382 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from HLN to ACH?
A nonstop flight takes about 10h 21m 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 Altenrhein?
Altenrhein is 8 hours ahead of Helena.
What is the cheapest way to fly from HLN to ACH?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on HLN–ACH that never appear on search engines, with no booking fees.