Originally Posted by
channa
Either that, or AC doesn't even serve BGI that day. Some of these destinations can be a bit more difficult to get simply because schedules aren't great.
I needed specific dates to BGI a couple years ago and ended up having to burn AA miles as a last resort after checking SkyTeam and Star first, both of wihch had either no flights or no availability.
AC966 YYZ-BGI is daily year-round.
What might be happening is switching between shoulder season aircraft.
B763 in winter, A319 in summer.
April (October too) is famous for that.