Old Nov 14, 15, 4:29 pm
FlyerTalk Evangelist
Join Date: Apr 2001
Location: NYC
Posts: 23,510
Combined Economy and Business Flight - Priority Check-In & Luggag

Absolutely use the business class checkin. If your business class flight is eligible for lounge access (not all routes are on AA), then you'll be eligible before your economy segment as well in most cases.
ijgordon is offline