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SIR to UNI: distance & flight time
Sion (Sion Airport) → Union Island (Union Island International Airport)
4,579 mi
7,369 km · 3,979 nm
9h 27m
estimated nonstop flight time
-6h
time difference · heading west
See live SIR→UNI fares Phone-only fares on this route — call free
Flight time details
4,579 miles nonstop takes roughly 9h 27m gate to gate, flying west. 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
- UNI — Union Island International Airport · Union Island, Saint Vincent and the Grenadines
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 UNI
- CIW · Canouan Airport8 mi away
- MQS · Mustique Airport25 mi away
- BQU · J F Mitchell Airport29 mi away
- SVD · Argyle International Airport42 mi away
Frequently asked questions
How far is SIR from UNI?
The flight distance from Sion (SIR) to Union Island (UNI) is 4,579 miles (7,369 km, 3,979 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SIR to UNI?
A nonstop flight takes about 9h 27m 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 Union Island?
Union Island is 6 hours behind Sion.
What is the cheapest way to fly from SIR to UNI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SIR–UNI that never appear on search engines, with no booking fees.