Hi
If you want to get info about details to reach the island from the airport of Naples Capodichino, go to our page
www.ischia.it/en/how-to-get-ischia.
The ticket cost of alibus is 3€ while to embark on hydrofoil is about 18€ and about 12€ on the ferry.
Should you have any further enquiries, please do not hesitate to contact me.
Kind Regards