Join Date: Jan 2005
Location: New York, NY
Programs: UA, AA, DL, Hertz, Avis, National, Hyatt, Hilton, SPG, Marriott
Posts: 10,070
Do you (or they) know his PIN number?
If so, I'll leave it at that without advocating any specific course of action. One-way award tickets are not currently available in the CO program, any travel must be booked as a roundtrip.
My condolences for the loss of your brother-in-law.