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CNN

Holiday travel: Airport survival guide

If you're using this option, save the bar code as a photo on your device, which will make it much easier to retrieve at security and at the gate, advised Bryan Saltzburg, general manager of TripAdvisor Flights…

 …"Know before you go," Saltzburg said. "There are fees, and it's important to educate yourself and be prepared and handle as much of the check-in process before you actually get to the airport."