How to reach L'Aquila
The usual way to reach L'Aquila is to go through Rome.
There are direct buses from Fiumicino airport to L'Aquila and viceversa, see
https://www.gasparionline.itThere are direct buses from Tiburtina bus station (in front of Tiburtina train station) to L'Aquila and viceversa, see
https://www.gasparionline.it
https://www.flixbus.it
https://www.autobus.it/IB3.33.34/arpagt/searchform.aspxThere are trains from Fiumicino airport to Roma Termini train station and viceversa, see
https://www.trenitalia.com
Metro B from Roma Termini to Tiburtina and viceversa.
Moving inside L'Aquila: informations about local buses can be found in
https://www.ama.laquila.it/
Tickets can be bought in shops (typically Tabaccheria) or using the app DropTicket, see the site https://shop.dropticket.it/ too.