Need help booking?
Unpublished phone-only deals available
SIR to BUF: distance & flight time
Sion (Sion Airport) → Buffalo (Buffalo Niagara International Airport)
4,023 mi
6,474 km · 3,496 nm
8h 21m
estimated nonstop flight time
-6h
time difference · heading northwest
See live SIR→BUF fares Phone-only fares on this route — call free
Flight time details
4,023 miles nonstop takes roughly 8h 21m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 6-hour time set-back when reading arrival times on your ticket.
The two airports
- SIR — Sion Airport · Sion, Switzerland
- BUF — Buffalo Niagara International Airport · Buffalo, 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 BUF
- IAG · Niagara Falls International Airport16 mi away
- YYZ · Lester B. Pearson International Airport68 mi away
- YCM · Niagara District Airport28 mi away
- DKK · Chautauqua County-Dunkirk Airport41 mi away
Frequently asked questions
How far is SIR from BUF?
The flight distance from Sion (SIR) to Buffalo (BUF) is 4,023 miles (6,474 km, 3,496 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SIR to BUF?
A nonstop flight takes about 8h 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 Sion and Buffalo?
Buffalo is 6 hours behind Sion.
What is the cheapest way to fly from SIR to BUF?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SIR–BUF that never appear on search engines, with no booking fees.