In reply to ck85:
Fly to Venice & bus to Cortina d`Ampezzo or train to Calalzo then bus to Cortina.
The second option can also be done from Treviso which is served by Ryanair.
Another longer option is by rail / bus from Bologna, use the TrenItalia website.
Good transport network from Cortina (Corvara, Dobbiaco)
A mix of low - high grade vf can easily be reached from C d`A by regular bus (SAD / Dolomiti bus)
Averau near Cinque Torre & Col de Bois & Tomaselli near Lagauzoi
Big mountain days on Tofana (Lipella & Punta Anna)
Col Rosa, Strobel & Sci 18 are all within walking distance of Cortina