Secret of getting between Orio Serio Malpensa Linate

I was at Rome Fiumicino airport earlier this year and amazed and disappointed to find there is about 1 bus a day connecting it with Ciampino Airport where i wanted to meet a work colleague arriving from France.

I thought the same problem existed getting from Milan Linate and Milan Malpensa to Bergamo Orio Serio airport but there is a trick. Buses to and from Linate and Malpensa, that run every 30 minutes or so during the day, stop at the medtro station Cassina di Gobbo and from there is a quite frequent service to Bergamo airport, therefore if you're arrriving at these airports you are not forced to spend €110 euros plus for the taxi ride.