Originally Posted by
tessy143
The trans-US route from Canada-Canada and vice versa isn't even legally allowed technically which is why airlines don't sell those tickets themselves you could purchase 2 separate legs via their website however you'd have to know what city pairs to look for whereas the OTA's will sometimes display them right to you.
Did you just search NYC-YUL on Expedia and this routing was populated? And it was on a single PNR?
I've had Expedia offer LAX-MEX-SAT (LAX-MEX on DL metal) before. However this was as part of a multi-city ticket. I've never had it offer it for straight OW/RT.