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ALO to GMP: distance & flight time
Waterloo (Waterloo Regional Airport) → Seoul (Gimpo International Airport)
6,378 mi
10,264 km · 5,542 nm
12h 58m
estimated nonstop flight time
+14h
time difference · heading northwest
See live ALO→GMP fares Phone-only fares on this route — call free
Flight time details
6,378 miles nonstop takes roughly 12h 58m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 14-hour time gain when reading arrival times on your ticket.
The two airports
- ALO — Waterloo Regional Airport · Waterloo, United States
- 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 ALO
- CCY · Northeast Iowa Regional Airport37 mi away
- CID · The Eastern Iowa Airport58 mi away
- MCW · Mason City Municipal Airport63 mi away
- PCD · Prairie Du Chien Municipal Airport72 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 ALO from GMP?
The flight distance from Waterloo (ALO) to Seoul (GMP) is 6,378 miles (10,264 km, 5,542 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ALO to GMP?
A nonstop flight takes about 12h 58m 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 ALO to GMP?
Nonstop service on ALO–GMP 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 12h 58m nonstop estimate.
What is the time difference between Waterloo and Seoul?
Seoul is 14 hours ahead of Waterloo.
What is the cheapest way to fly from ALO to GMP?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ALO–GMP that never appear on search engines, with no booking fees.
Why are some ALO to GMP fares phone-only?
Consolidator contracts let us sell certain ALO–GMP 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.