Originally Posted by
canadiancow
Not impossible, but the 3 dailies are all 320s right now. Under regular operations, duration has no bearing on whether something is rouge or mainline. It's about the route. And SFO-YUL is PLH, meaning it will not go rouge.
There was a time when they ran 762s. And J was only marginally more than Y if no Sat. night stay. :-)