You can easily reach Lugano Airport also by train, thanks to the Lugano-Ponte Tresa Train Service (FLP) starting from directly opposite the main Railway Station in Lugano. From the stop at Agno you can reach the airport in 10 minutes' walk. The service is available everyday.
For further information on the timetable and costs kindly visit the FLP website:
Mon-Fri: every 15 minutes from 06:25 to 20:10
Sunday and Bank holidays: every 30 minutes