I think Milan is closer to Verona than Bologna and certainly has more flights, generally for less cost. Aer Lingus fly to two airports in Milan all year around but only fly to Bologna during the Summer. Ryanair's "Bologna" is even further away and more inconvenient.
Venice, to which Aer Lingus also fly, is also reasonably good for Verona. It's about a 30 minute bus journey from the airport to Venice itself from where you can get a direct train to Verona.
Depending on where you stay in Verona, you might have car parking. This might be useful if you're doing a lot of travelling but if Verona is your only destination, the train might be handier.