1. Can the _HSL Day Ticket_ (matkailijalippu, 1 day €8,00) be used to travel on Regional bus 615 (Helsinki-Vantaa Airport ↔ Helsinki central railway station) ?
2. Where can I get the _HSL Day Ticket_ at the airport? (Or is it available from the bus driver?)
P.S. I'll be arriving at HEL's Terminal 2 on 17 Sep 06:00, and leave at 17:10.