Original Member and FlyerTalk Evangelist
Join Date: May 1998
Location: Kansas City, MO, USA
Programs: DL PM/MM, AA ExPlat, Hyatt Glob, HH Dia, National ECE, Hertz PC
Posts: 16,619
Delta lets you use segment upgrades online, you can see what's available and select whether you want a window or aisle, or if an upgrade is not available you can select to be waitlisted.