No, not every traveler needs one — but here's how to find out if you do. Carlina Teteris/Getty Images When you book a flight online, there's quite a bit of information you need to provide, from your ...

Your bags are packed, you left early for the airport, and you can’t wait to get where you’re going. It’s a sunny day, and the views from your window seat should be ideal, letting you take in the views ...