A little bit of creative googling gets us a list of PP's best discount codes..

Almost all of these are interesting, each one giving a slight variation on the deal. For me, the most interesting is the first one - giving premium membership @ 319USD per year recurring for ANY country (as opposed to most deals still charging in EU or GBP etc)

www.prioritypass.com/tp/joesentme0305
www.prioritypass.com/tp/aecit
www.prioritypass.com/tp/oxchairman03
www.prioritypass.com/tp/aeces
www.prioritypass.com/tp/visap
www.prioritypass.com/tp/satw
www.prioritypass.com/tp/uniglobe
www.prioritypass.com/tp/visasb
www.prioritypass.com/tp/airplus
www.prioritypass.com/tp/etn
www.prioritypass.com/tp/aecnl
www.prioritypass.com/tp/portamex06
www.prioritypass.com/tp/CWG
www.prioritypass.com/tp/aecuk
www.prioritypass.com/tp/aecger
www.prioritypass.com/tp/aecse
www.prioritypass.com/tp/PORTAMEX06
www.prioritypass.com/tp/attl
www.prioritypass.com/tp/mc