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SIR to SPF: distance & flight time
Sion (Sion Airport) → Spearfish-South Dakota (Black Hills Airport-Clyde Ice Field)
4,895 mi
7,878 km · 4,254 nm
10h 4m
estimated nonstop flight time
-8h
time difference · heading northwest
See live SIR→SPF fares Phone-only fares on this route — call free
Flight time details
4,895 miles nonstop takes roughly 10h 4m 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
- SPF — Black Hills Airport-Clyde Ice Field · Spearfish-South Dakota, 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 SPF
- RCA · Ellsworth Air Force Base41 mi away
- RAP · Rapid City Regional Airport47 mi away
- GCC · Gillette Campbell County Airport87 mi away
- CDR · Chadron Municipal Airport119 mi away
Frequently asked questions
How far is SIR from SPF?
The flight distance from Sion (SIR) to Spearfish-South Dakota (SPF) is 4,895 miles (7,878 km, 4,254 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SIR to SPF?
A nonstop flight takes about 10h 4m 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 Spearfish-South Dakota?
Spearfish-South Dakota is 8 hours behind Sion.
What is the cheapest way to fly from SIR to SPF?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SIR–SPF that never appear on search engines, with no booking fees.