Originally Posted by
littlegreenmen
can't say I've tried to extend any, but if you applied a 2012-earned GPU in June 2013 for a Dec 2013 flight and it never cleared, it would be pretty bogus if they only gave you 1 month to use it. not that UA cares about fair, but it seems the appropriate thing to do would be to put a 365 day expiration on them but suspend accrual while upgrades are waitlisted.
Interesting idea but UA and their competitors have never done that. PMUA did some forms of extension on request but stopped that prior to the merger.