FlyerTalk Evangelist
Join Date: May 2012
Location: MCO
Programs: AA, B6, DL, EK, EY, QR, SQ, UA, Amex Plat, Marriott Tit, HHonors Gold
Posts: 12,809
The connection to the UA Club is technically airside, there is no need to re-clear security. Just make sure you stay within the sterile area when switching trains.