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SIR to HLN: distance & flight time
Sion (Sion Airport) → Helena (Helena Regional Airport)
5,046 mi
8,120 km · 4,384 nm
10h 22m
estimated nonstop flight time
-8h
time difference · heading northwest
See live SIR→HLN fares Phone-only fares on this route — call free
Flight time details
5,046 miles nonstop takes roughly 10h 22m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 8-hour time set-back when reading arrival times on your ticket.
The two airports
- SIR — Sion Airport · Sion, Switzerland
- 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 SIR
- AOT · Aosta Airport33 mi away
- QLS · Lausanne-Blécherette Airport41 mi away
- ZIN · Interlaken Air Base41 mi away
- MVV · Megève Airport43 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 SIR from HLN?
The flight distance from Sion (SIR) to Helena (HLN) is 5,046 miles (8,120 km, 4,384 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SIR to HLN?
A nonstop flight takes about 10h 22m 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 Sion and Helena?
Helena is 8 hours behind Sion.
What is the cheapest way to fly from SIR to HLN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SIR–HLN that never appear on search engines, with no booking fees.