Hi!
I JS on NWA sometimes on that route-no problem (NWA has 2 JS lists: The domestic list includes 50 states and Canada). The drive time, airport to airport, is about 4.5 hours, depending on how long the bridge vs. tunnel takes. To get from YYZ to downtown, take the rocket bus, which goes direct from YYZ to the west end station of the subway line. Then you're in the system and can go anywhere via subway/bus/streetcar.
cliff
LRD