So, it's a good idea to add the TSA PreCheck number to your profile on any airline you frequent ... KTN and apply it to your boarding pass every time you buy a ticket. Without the PreCheck ...

American Airlines didn't forget bag check in this implementation. Customers can scan their mobile boarding pass at any one of the self-service machines, ticket counters, or curbside check-in ...

I f you don't travel often, you may not have considered signing up for the TSA PreCheck program. But even if you only fly ...