Distance From Castlereagh Lake Seaplane Base to Chiang Mai International Airport, NUF - CNX Distance

The distance from Castlereagh Lake Seaplane Base (NUF) to Chiang Mai International Airport (CNX) is 1485 miles or 2389 kilometers or 1289 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 Chiang Mai ( Thailand )?

A one-way nonstop (direct) flight between Hatton and Chiang Mai takes around 3 hours 24 minutes.

Estimated flight time from Castlereagh Lake Seaplane Base, Hatton, Sri Lanka to Chiang Mai International Airport, Chiang Mai, Thailand is 3 hours 24 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 - CNX

Kilometers		2389 km
Statute Miles		1485 miles
Nautical Miles		1289 nm
Avg. Time of Flight		3 hours 24 minutes

Castlereagh Lake Seaplane Base to Chiang Mai International Airport Flight Route Map - NUF to CNX Flight Path

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

Click to see flight route on Google Map between Hatton, Sri Lanka and Chiang Mai, Thailand. .

Nonstop flight route between Hatton, Sri Lanka and Chiang Mai, Thailand.

Time Difference Between the Airports • NUF - CNX

Time difference between Hatton (Sri Lanka) and Chiang Mai (Thailand) is 1 Hours 30 Minutes.
Chiang Mai time is 1 Hours 30 Minutes ahead of Hatton.

Location	Local Time
Hatton (Sri Lanka)	2026-09-21, 00:35:34 +0530
Chiang Mai (Thailand)	2026-09-21, 02:05:34 +07

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

Chiang Mai International Airport (CNX / VTCC) Chiang Mai, Thailand