2 possible reasons why EY might fly to BRU. The first is that there is a large amount of traffic between BRU and India. This is could be why Jet Airways was planning to go there as well on their way to JFK (on hold now due to court proceedings against Jet Airways). The second reason might be traffic rights. There is no way EY can get traffic rights from the UK to N. America. But if EY was able to get them from BRU, then it can fill the plane with local traffic which would be helpful as they will probably be higher yield than the ISC traffic to Canada.