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Wolkenlaufer wrote:

I haven't seen any recent discussion on this, so I'd like to ask you
if they are COMPLETELY gone (except for buying a full price ticket and
trying for an earlier flight) or are there still airlines doing this?

Westjet doesn't do true standby, but I've bought deeply discounted
tickets 12-36 hours in advance of the flight and paid their lowest rates
for the flight (typically in the $49 range)

As far as I know, this is about as close as you can get.