Originally Posted by Boogie711

I'm a Canadian and I start just about every trip out of YYZ (Toronto).

If I search YYZ-EWR-HKG, I'm going to see PZ0. But if I search JUST EWR-HKG, I will see PZ4. It's been like that for years. I'm just used to it.

The long and the short of it - when you add extra segments, it screws up availability. There's a bunch of reasons... third countries screw it up. Being on a barbie jet with only economy class (from YYZ to EWR on a Embraer135) will screw it up.

But using my above mentioned example, if I go ahead and book a W fare YYZ-EWR-HKG, even though it shows PZ0, my GPU will still clear instantly on EWR-HKG.