Originally Posted by
aerobod
You can check with the interactive route map at
http://www.westjet.com/guest/en/flig...oute-map.shtml or by looking at step 1 of flight booking, there are 11 O&Ds eligible for American codeshare flights to/from DFW or LAX via Toronto:
YYG, YDF, YHZ, YQM, YUL, YOW, YQB, YYT, YQY, YQT, YWG
How do you see these are all code shared?