Please be aware that Brussels has multiple airports and that these results are for all airports serving the city.
The best month to arrive at Brussels is June and the most expensive month to fly is April. (Average prices, based on 1302 datapoints.)
The best day to arrive at Brussels is Saturday and it would be best to avoid Friday, as prices are on average 35.17% higher than on Saturday. (Average prices, based on 334 datapoints.)
The cheapest airline flying to Brussels is Aer Lingus. They are 70% cheaper than Brussels Airlines. (Average prices, based on 1370 datapoints.)
At Brussels the most flights depart around 17:00. (Hourly flights, based on 1416 datapoints.)
From Brussels it is on average the cheapest to fly to Madrid and to Rome. (Average prices, based on 375 datapoints.)