Originally Posted by
jona970318
I've had experiences standing-by at HKG after missing a flight on award tickets. I didn't end up paying. But I'm not sure how things might change if you volunteerily want to change to an earlier flight
Before they started charging for flight changes on award tickets, standby on award tickets was allowed, as award tickets were fully flexible within the validity period.
I'm not sure if they charge for flight changes on award tickets now.