chadd,
When they cancel flights before you leave (either months or weeks, sometimes days) are they not trying to combine flights due to low occupancy? A few years ago we were to fly out of Washington to Aruba in December, they cancelled the flight in the summer and had to reroute us

! Not easy to do as we were travelling during Christmas and on points. It was a lot of aggrevation as all the flights were full!!!
Last year, two weeks before we were to leave Aruba they cancelled our return flights home. Had to scramble again!