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 December and the most expensive month to fly is August. (Average prices, based on 1154 datapoints.)
The best day to arrive at Brussels is Thursday and it would be best to avoid Friday, as prices are on average 38.41% higher than on Thursday. (Average prices, based on 1324 datapoints.)
The cheapest airline flying to Brussels is Ryanair. They are 80% cheaper than Swiss Int Air Lines. (Average prices, based on 1176 datapoints.)
At Brussels the most flights depart around 08:00. (Hourly flights, based on 1240 datapoints.)
From Brussels it is on average the cheapest to fly to London and to Rome. (Average prices, based on 351 datapoints.)