The last miles we managed to burn were for 4x pax in biz Europe -> Asia on AY, booked in Q1 this year (May have been Jan) for flying in Aug. Tried to see if I could move the date for 1x pax recently, looked on many routes with many carriers on many dates (+/-10d), virtually no cigar. Looked extremely dry to me. Glad we burned all of our remaining AsiaMiles with this ticket.