Distance From Castle Airport to Gimpo International Airport, MER - GMP Distance

The distance from Castle Airport (MER) to Gimpo International Airport (GMP) is 5712 miles or 9193 kilometers or 4961 nautical miles.

The distance shown below is direct flight distance between airports. Straight-line distance does not account for the surface between the two points. It is the distance a bird or airplane would travel between the two points when flying above the surface. The straight line distance is the direct route between two points, regardless of whether or not there are roads that connect them.

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How long does it take to travel from Merced ( United States ) to Seoul ( South Korea )?

A one-way nonstop (direct) flight between Merced and Seoul takes around 13 hours 7 minutes.

Estimated flight time from Castle Airport, Merced, United States to Gimpo International Airport, Seoul, South Korea is 13 hours 7 minutes under avarage conditions. Your actual flying time may vary depending on wind direction/speed or weather conditions. This calculation does not include the departure and landing times of the aircraft. In addition, it does not cover the person identity check, ticket check-in and baggage collection times at the airport.

Travel Distance Between the Airports • MER - GMP

Kilometers		9193 km
Statute Miles		5712 miles
Nautical Miles		4961 nm
Avg. Time of Flight		13 hours 7 minutes

Castle Airport to Gimpo International Airport Flight Route Map - MER to GMP Flight Path

Location of Castle Airport & Gimpo International Airport is given below.
Click the map to view Merced to Seoul nonstop flight path and travel direction.

Click to see flight route on Google Map between Merced, United States and Seoul, South Korea. .

Nonstop flight route between Merced, United States and Seoul, South Korea.

Time Difference Between the Airports • MER - GMP

Time difference between Merced (United States) and Seoul (South Korea) is 16 Hours.
Seoul time is 16 Hours ahead of Merced.

Location	Local Time
Merced (United States)	2026-03-13, 16:23:07 PDT
Seoul (South Korea)	2026-03-14, 08:23:07 KST

Why should you arrive 3 hours before international flight? Flyers who are traveling to an international destination should arrive at the airport earlier than domestic flyers. This is because international flights can have additional check-in requirements, like passport verification, that need to be completed before you receive your boarding pass.

Origin

Castle Airport (MER / KMER) Merced, United States

Destination

Gimpo International Airport (GMP / RKSS) Seoul, South Korea