The YHZ-YQY ripoff — it still doesn’t add up

Contrarian's aviation guru, Adrian Noskwith, thinks the Porter Airlines 50%-off sale may have played a role in the weird pricing I encountered flying from Toronto to Sydney (as Joe MacKay argued), but it's not the whole story. Airline pricing is a weird science at the best of times. When Porter is whipping Air Canada's ass out of Toronto Island, as they are at the moment, this drives airline pricing executives to do even weirder things. But why is it consistently cheaper to fly from Sydney to St. Johns (via Halifax) than from Sydney to Halifax? To check this claim, I priced one-way Air Canada...