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ACH to ICN: distance & flight time
Altenrhein (St Gallen Altenrhein Airport) → Seoul (Incheon International Airport)
5,398 mi
8,687 km · 4,691 nm
11h 3m
estimated nonstop flight time
+8h
time difference · heading northeast
See live ACH→ICN fares Phone-only fares on this route — call free
Flight time details
5,398 miles nonstop takes roughly 11h 3m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 8-hour time gain when reading arrival times on your ticket.
The two airports
- ACH — St Gallen Altenrhein Airport · Altenrhein, Switzerland
- ICN — Incheon International Airport · Seoul, South Korea
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 ACH
- HOH · Hohenems-Dornbirn Airport9 mi away
- FDH · Friedrichshafen Airport13 mi away
- ZRH · Zürich Airport47 mi away
- FMM · Memmingen Allgau Airport47 mi away
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
Frequently asked questions
How far is ACH from ICN?
The flight distance from Altenrhein (ACH) to Seoul (ICN) is 5,398 miles (8,687 km, 4,691 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ACH to ICN?
A nonstop flight takes about 11h 3m 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 ACH to ICN?
Nonstop service on ACH–ICN 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 3m nonstop estimate.
What is the time difference between Altenrhein and Seoul?
Seoul is 8 hours ahead of Altenrhein.
What is the cheapest way to fly from ACH to ICN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ACH–ICN that never appear on search engines, with no booking fees.
Why are some ACH to ICN fares phone-only?
Consolidator contracts let us sell certain ACH–ICN 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.