Join Date: Feb 2007
Location: Pensacola, FL (PNS)
Programs: Delta 1.99M, Hyatt Globalist, IHG Diamond, Marriott Gold, Hilton Diamond
Posts: 2,714
I believe it's "redeem by".
I just tried to book a trip in May, with a credit expiring next April, and it basically got to the end (I didn't click complete).