Soon, the days of tucking your boarding pass into your passport will be a distant memory. As more airlines move towards digital boarding passes – including Ryanair, which will ban paper boarding ...

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

Check your boarding pass: If the letters SSSS are on it, expect to spend extra time at security. Here's what triggers SSSS on a boarding pass.

But your boarding pass contains a lot more than just your plane seat and gate number. It also includes codes that communicate details about passengers and their itineraries to airport staff.

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.