The letter and number codes on a boarding pass tell a lot about you, including whether you've been chosen for extra screening ...

If you’ve received your boarding pass or e-ticket barcode in an email, you can simply use this at the airport. No additional apps needed. How to Add an Electronic Boarding Pass to Google Pay.

If SSSS appears on your boarding pass, plan for an additional 15-45 minutes of TSA screening when you get to the airport. Here's why.