Why isn't there more traffic through other airports, then? I mean, if YYZ is so expensive and inefficient, why are airlines not taking more advantage of YOW and YUL? As it stands, Canada has its one superhub airport. If you leave anywhere east of the Saskatchewan/Manitoba border chances are pretty damn good you will have to transfer at YYZ for any domestic flight heading east, most transborder flights, and almost all international flights not heading to Asia. In the west, the same can almost be said of YVR. YOW, which has a fairly new expanded terminal and is planning further expansion, has only minimal transborder flights and only one regularly scheduled transatlantic flight a day (AC to LHR). Why isn't YOW attracting more traffic? Why are there fewer and fewer transatlantic options from YUL each year? I've said this before, but it feels like the trend is to end up with two superhubs at YYZ and YVR, with all other airports relegated to regional status. If YYZ is so expensive and inefficient, why does it seem like other options are not being considered by the airlines?