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SIR to WBU: distance & flight time
Sion (Sion Airport) → Boulder (Boulder Municipal Airport)
5,172 mi
8,323 km · 4,494 nm
10h 36m
estimated nonstop flight time
-8h
time difference · heading northwest
See live SIR→WBU fares Phone-only fares on this route — call free
Flight time details
5,172 miles nonstop takes roughly 10h 36m 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
- WBU — Boulder Municipal Airport · Boulder, 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 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
Frequently asked questions
How far is SIR from WBU?
The flight distance from Sion (SIR) to Boulder (WBU) 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 SIR to WBU?
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 Sion and Boulder?
Boulder is 8 hours behind Sion.
What is the cheapest way to fly from SIR to WBU?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SIR–WBU that never appear on search engines, with no booking fees.