The distance between Brussels and Rome is 1.188km or 743 miles.

Ryanair Boeing 737-800 in Brussels
Ryanair flies from Brussels South (CLR) to Rome Ciampino (CIA). During the Summer of 2010 they seems to offer 3 daily flights on this route. As it's Ryanair in 2010 all these flights are with Boeing 737-800, seating 189 passengers.

Brussels airlines
Hubsdestinationsfleet

Brussels airlines offers daily flights from Brussels (BRU) to Rome (FCO) in the Summer of 2009.

Alitalia
Hubsdestinationsfleet

Alitalia is active on this route several times a day 2010. The A321 and A320 are often used on the route.