A FlyerTalk Posting Legend
Join Date: Sep 2009
Location: Minneapolis: DL DM charter 2.3MM
Programs: A3*Gold, SPG Plat, HyattDiamond, MarriottPP, LHW exAccess, ICI, Raffles Amb, NW PE MM, TWA Gold MM
Posts: 100,409
AmEx Centurion means PM on DL for the cardholder.
AFAIK the PP memberships that come with AmEx Plat (and Centurion???) do not give free guests unless this has been changed recently. A guest results in a charge of about $30 to the AmEx card.
We're assuming that the family is flying in coach.....