<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by AAirline Geek:
Air Canada and other airlines could fly routes beyond US partner gateways such as DEN or ORD to cities that it could not serve on a non-stop basis from Canada. How about a YYZ-MIA-GIG/GRU/EZE service? Coordinating schedule with airline partners would make it even more effective (ex UA or RG).
</font>
AC already flies to GRU and EZE. Any touchdown in the USA on the way to anywhere else would be a severe disadvantage these days and would be the source of many hassles for transiting passengers (ie. the Honolulu shuffle). It would also exclude some passengers from even using these flights due to VISA issues.