My 23-year-old recently moved to Philly. We live in Dallas, TX. I've worked for Southwest Airlines for 20 years, so my son has never flown on any airline other than SWA. Unfortunately, SWA doesn't offer direct flights from PHL to Dallas, but AA does. I'm trying to figure out how things work for AA booking, etc. I recently created a AA account and I plan to get my son to make one as well. We all have TSA Pre. I have many questions. Can I sign in to my account and book a flight for him? When I book it, do I specify his KTN and AAdvantage number? Will that add his flight to his account (iPhone app)? I assume there is a check-in process to get your boarding pass, can I check him? Will I receive an email when I book him with his confirmation number (PNR)? Can I check him in using the PNR? I assume he can then access his BP on the app and store it in his Apple wallet? He generally takes a rolling bag and backpack on board; is that allowed on AA (backpack under the front seat, rolling bag in the overhead)? And lastly, how does the boarding work for AA? Do they call you up by row? Sorry for all the questions.