Have you ever been tempted by an unbelievable flight deal, only to discover it's gone by the time you get to check out? Do booking sites really increase their prices based on how long you spend on the site? We're fact-checking and myth-busting with Expedia's own Director of Revenue Optimization, Amy Cisneroz. Tell us about the best travel deals you've scored at [email protected] or find us on Twitter, Facebook and Instagram!