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ACH to GMP: distance & flight time
Altenrhein (St Gallen Altenrhein Airport) → Seoul (Gimpo International Airport)
5,404 mi
8,697 km · 4,696 nm
11h 4m
estimated nonstop flight time
+7h
time difference · heading northeast
See live ACH→GMP fares Phone-only fares on this route — call free
Flight time details
5,404 miles nonstop takes roughly 11h 4m 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
- ACH — St Gallen Altenrhein Airport · Altenrhein, Switzerland
- GMP — Gimpo 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 GMP
- ICN · Incheon International Airport20 mi away
- SSN · Seoul Air Base (K-16)19 mi away
- SWU · Suwon Airport25 mi away
- OSN · Osan Air Base35 mi away
Frequently asked questions
How far is ACH from GMP?
The flight distance from Altenrhein (ACH) to Seoul (GMP) is 5,404 miles (8,697 km, 4,696 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ACH to GMP?
A nonstop flight takes about 11h 4m 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 Altenrhein and Seoul?
Seoul is 7 hours ahead of Altenrhein.
What is the cheapest way to fly from ACH to GMP?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ACH–GMP that never appear on search engines, with no booking fees.