Hi everyone. My family (wife and three kids) and I fly to Canada from UK at least once a year, usually on the lowest fair we can find on a decent carrier (mainly BA or Air Canada). I was wondering if anyone could give me some advice on whether I should be collecting miles. I already collect Airmiles (only 4000 or so), but is it worth me collecting either BA miles or Aeroplan (Air Canada) instead, or none as I only go once a year or so. Thanks .