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ICN to SIR: distance & flight time
Seoul (Incheon International Airport) → Sion (Sion Airport)
5,534 mi
8,907 km · 4,809 nm
11h 19m
estimated nonstop flight time
-8h
time difference · heading northwest
See live ICN→SIR fares Phone-only fares on this route — call free
Flight time details
5,534 miles nonstop takes roughly 11h 19m 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
- ICN — Incheon International Airport · Seoul, South Korea
- 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 ICN
- GMP · Gimpo International Airport20 mi away
- SWU · Suwon Airport34 mi away
- SSN · Seoul Air Base (K-16)36 mi away
- OSN · Osan Air Base41 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 ICN from SIR?
The flight distance from Seoul (ICN) to Sion (SIR) is 5,534 miles (8,907 km, 4,809 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ICN to SIR?
A nonstop flight takes about 11h 19m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
Are there nonstop flights from ICN to SIR?
Nonstop service on ICN–SIR depends on the season and the day of week. Run the fare search on this page with the nonstop filter applied to see current direct options; when there is no nonstop, a single connection through a carrier hub adds roughly 2–4 hours to the 11h 19m nonstop estimate.
What is the time difference between Seoul and Sion?
Sion is 8 hours behind Seoul.
What is the cheapest way to fly from ICN to SIR?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ICN–SIR that never appear on search engines, with no booking fees.
Why are some ICN to SIR fares phone-only?
Consolidator contracts let us sell certain ICN–SIR tickets below the price airlines permit us to publish online, so those fares can only be quoted over the phone. Call the travel desk and an agent will check phone-only inventory for your dates.