Need help booking?
Unpublished phone-only deals available
SIR to ISM: distance & flight time
Sion (Sion Airport) → Kissimmee (Kissimmee Gateway Airport)
4,780 mi
7,693 km · 4,154 nm
9h 50m
estimated nonstop flight time
-6h
time difference · heading west
See live SIR→ISM fares Phone-only fares on this route — call free
Flight time details
4,780 miles nonstop takes roughly 9h 50m 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
- ISM — Kissimmee Gateway Airport · Kissimmee, 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 ISM
- MCO · Orlando International Airport12 mi away
- ORL · Orlando Executive Airport19 mi away
- GIF · Winter Haven Regional Airport - Gilbert Field25 mi away
- TPA · Tampa International Airport70 mi away
Frequently asked questions
How far is SIR from ISM?
The flight distance from Sion (SIR) to Kissimmee (ISM) is 4,780 miles (7,693 km, 4,154 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SIR to ISM?
A nonstop flight takes about 9h 50m 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 Kissimmee?
Kissimmee is 6 hours behind Sion.
What is the cheapest way to fly from SIR to ISM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SIR–ISM that never appear on search engines, with no booking fees.