Originally Posted by oklAAhoma
For upgrading purposes AA considers Canada (as well as Mexico and Central America) domestic. You should be able to use your stickers between YUL and ORD, JFK, or any other US city that AA serves. Assuming availability, of course.
Not via JFK: it's all ERJs, all the time. And only two mainline flights to ORD (and two RJs). (Also 3 MIA and 1 DFW on mainline, but going to Europe, these aren't that much use except for MRs...)