Originally Posted by
canadiancow
LHR-YGK is easily bookable as a round trip, stopping in YYZ both ways. But if you want to stop in YYZ on the outbound, there are "no flights" available for YGK-LHR.
Thats weird, because I have booked YYZ-XXX-BKK(stop)-SIN-BKK-XXX-YYZ