Originally Posted by
Jasper2009
however the airline would fly a half empty plane on the domestic route and no new pax would board at the intermediate airport.
Not really. There was no local boarding at YVR but other international arrival could connect to this flight bypassing Canadian immigration/custom formalities at YVR until they arrived at YYZ. For the half dozen or so CP4/8 that I flew, they were >90% full.