Hi all,

Apologies if my questions has been answered before somewhere (if so I can't track it down). I find AC to be super vague on upgrades, and an agent I once asked was evasive and vague. So: I am Prestige 25K flying regularly between YYZ and LGA. Can I go on standby for an earlier flight from LGA to YYZ at the airport without paying the change fee?

Thank you!