Originally Posted by
Seat13F_AC_CRJ
If your earlier flight is on time, and your second flight is with AC, you may be able to move to the earlier flight, or standby for the earlier flight. Sometimes this same-day-change is free, but I am not a master of the rules.
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In my 20 plus years of flying between Vancouver Island and Texas, had very little luck trying to catch an earlier flight on a standby basis, that as United Airlines/Star ⭐ Alliance Gold, and even my 1K days at United.
But it doesn't hurt to ask ......