This airline employee-approved travel hack eliminates these worries, using an app everyone has on their phone.

Most airlines, and pretty much all legacy carriers (for example United, Delta, and American) have iPhone apps that allow you to check in and digitally retrieve your boarding pass on your phone.

One-third of airline boarding passes will be delivered via mobile devices by 2019, supporting efforts to drive mobile ticket purchases, according to a new report from Juniper Research. Juniper ...