Need help booking?
Unpublished phone-only deals available
DUC to SIR: distance & flight time
Duncan (Halliburton Field) → Sion (Sion Airport)
5,184 mi
8,343 km · 4,505 nm
10h 38m
estimated nonstop flight time
+7h
time difference · heading northeast
See live DUC→SIR fares Phone-only fares on this route — call free
Flight time details
5,184 miles nonstop takes roughly 10h 38m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 7-hour time gain when reading arrival times on your ticket.
The two airports
- DUC — Halliburton Field · Duncan, 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 DUC
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 DUC from SIR?
The flight distance from Duncan (DUC) to Sion (SIR) is 5,184 miles (8,343 km, 4,505 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from DUC to SIR?
A nonstop flight takes about 10h 38m 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 Duncan and Sion?
Sion is 7 hours ahead of Duncan.
What is the cheapest way to fly from DUC to SIR?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on DUC–SIR that never appear on search engines, with no booking fees.