is currently scheduling at least one daily round trip between MXP
using the A319. However, it is significantly weight restricted--no more than 100 passengers, possibly fewer.
I believe the 737-700 has been to FLR
for demonstrations to Meridiana as a potential 146 replacement--or at the very least Boeing has made a sales pitch to that effect--but I don't think there is any regularly scheduled 737 service at FLR
Common sense is not so common. -Voltaire