Bergamo is to be the next Ryanair base to offer connecting flights. (Bergamo is, somewhat surprisingly to me, Ryanair's biggest mainland European base with 9.2 million Ryanair pax in 2016 and an average load factor of 90%, and 3rd overall in passenger numbers behind Stansted and Dublin).
Ryanair will offer connection options to passengers travelling between Alicante, Athens, Barcelona, Bari, Brindisi, Cagliari, Catania, Corfu, Ibiza, Lanzarote, Lamezia Terme, Madrid, Malaga, Malta, Naples, Palermo, Pescara, Trapani, Valencia and Zaragoza.