• Easiest way to take a taxi from the airport, which would cost around 7000-8000 LKR (45-50 $).
• A cheaper option would be to take a train from Colombo Fort train station to Ahangama station.
• From Colombo airport, there are shuttle busses to the Colombo Fort Train station or you can try Uber/tuktuk/taxi from Airport. The shuttle runs during the day and it is right at the exit of the airport, which is hard to miss so you would definitely see it on the way. From airport to Colombo Fort station takes around 45 min depending on the traffic. From Colombo Fort train station to Ahangama takes around 2 hrs with the express train. Make sure you get the express train which doesn't stop in every place. You can also try Habaraduwa as well if they say you missed Ahangama train. Habaraduwa and Ahangama are both in the same distant to our place. When you reach to Ahangama or Habaraduwa; a tuktuk ride from the station to our place is around 10 min. Ask the tuktuk drive for the Kabalana Beach then you will see our sign on the way.