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WBU to SIR: distance & flight time
Boulder (Boulder Municipal Airport) → Sion (Sion Airport)
5,172 mi
8,323 km · 4,494 nm
10h 36m
estimated nonstop flight time
+8h
time difference · heading northeast
See live WBU→SIR fares Phone-only fares on this route — call free
Flight time details
5,172 miles nonstop takes roughly 10h 36m 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
- WBU — Boulder Municipal Airport · Boulder, United States
- SIR — Sion Airport · Sion, 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 WBU
- DEN · Denver International Airport32 mi away
- BJC · Rocky Mountain Metropolitan Airport11 mi away
- FNL · Northern Colorado Regional Airport31 mi away
- BFK · Buckley Air Force Base34 mi away
Near SIR
- AOT · Aosta Airport33 mi away
- QLS · Lausanne-Blécherette Airport41 mi away
- ZIN · Interlaken Air Base41 mi away
- MVV · Megève Airport43 mi away
Frequently asked questions
How far is WBU from SIR?
The flight distance from Boulder (WBU) to Sion (SIR) is 5,172 miles (8,323 km, 4,494 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from WBU to SIR?
A nonstop flight takes about 10h 36m 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 Boulder and Sion?
Sion is 8 hours ahead of Boulder.
What is the cheapest way to fly from WBU to SIR?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on WBU–SIR that never appear on search engines, with no booking fees.