Just one option:

Go to your local hospital and ask to talk to an Administrator and/or Social Worker. See if there are any underprivileged families or individuals in need of an immediate free ticket to get distant family in to attend a funeral or visit an ill or dying loved one.

I'm gonna guess that United award tickets (whether on United metal or Delta or US Airways partner award tickets) will be safe until at least the end of May. But best to inform them of the situation in advance and advise them not to linger around too long, or they could get stranded if United liquidates.