Originally Posted by Shareholder
STAR awards have never permitted standby for earlier flights so no change there. These have always been very restrictive with no changes after departure.
Actually you now can change travel dates after departure, on a *A award, subject to availability and paying a change fee. You can't change routing. The actual rule is:
"For Star Alliance or other airline rewards, changes are permitted prior to outbound travel. Once travel on the ticket has commenced, changes to date and/or flight number are permitted on Star Alliance electronic tickets only (certain conditions apply)."