I love city hoping in Europe because it is so easy to do, as the distances combined with the bus or train connections makes the old continent the perfect environment to do so.
If April and May are not for the beach destinations then a 3 in one city break in spring could be just what you need. The weather is perfect for city walks and the blossom transforms the parks and streets in living paintings.
I found this combination of flights, for you to see Bologna, Florence and Pisa from Bucharest. The connection could cost you some 25 euros per person. The flights prices are with Wizzair membership card. More options available at similar prices.
Note that we are not an online tourism agent and do not provide services of any commercial type. We just share what we find and give you suggestions about great destinations in the best periods. Just follow the link to book by yourself.