Originally Posted by danapop

Big difference. First, with WS not in alliance with AF/KLM/DL, its not really the same thing. AFAIK, its a code share agreement, Nothing more.

Second, the biggest difference is frequency of flights to/from Europe is dramatically different. On any given day you have multiple AC fights to and from LHR to YUL/YOW/YYZ/YVR/YYC. WS doesn't have that. If something happens in LHR (for example) there is significantly less capacity to deal with the IRROPS and accommodate passengers on alternative flights to Canada.