Distance From Castlereagh Lake Seaplane Base to Gimpo International Airport, NUF - GMP Distance

The distance from Castlereagh Lake Seaplane Base (NUF) to Gimpo International Airport (GMP) is 3584 miles or 5768 kilometers or 3112 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 Hatton ( Sri Lanka ) to Seoul ( South Korea )?

A one-way nonstop (direct) flight between Hatton and Seoul takes around 8 hours 14 minutes.

Estimated flight time from Castlereagh Lake Seaplane Base, Hatton, Sri Lanka to Gimpo International Airport, Seoul, South Korea is 8 hours 14 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 • NUF - GMP

Kilometers		5768 km
Statute Miles		3584 miles
Nautical Miles		3112 nm
Avg. Time of Flight		8 hours 14 minutes

Castlereagh Lake Seaplane Base to Gimpo International Airport Flight Route Map - NUF to GMP Flight Path

Location of Castlereagh Lake Seaplane Base & Gimpo International Airport is given below.
Click the map to view Hatton to Seoul nonstop flight path and travel direction.

Click to see flight route on Google Map between Hatton, Sri Lanka and Seoul, South Korea. .

Nonstop flight route between Hatton, Sri Lanka and Seoul, South Korea.

Time Difference Between the Airports • NUF - GMP

Time difference between Hatton (Sri Lanka) and Seoul (South Korea) is 3 Hours 30 Minutes.
Seoul time is 3 Hours 30 Minutes ahead of Hatton.

Location	Local Time
Hatton (Sri Lanka)	2026-11-05, 08:29:30 +0530
Seoul (South Korea)	2026-11-05, 11:59:30 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

Castlereagh Lake Seaplane Base (NUF / ) Hatton, Sri Lanka

Destination

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