(Bloomberg) -- Making sure you pay a reasonable fare for flights often feels like a fool’s errand. If you’re lucky, you’ll snag a mistake fare or flash sale. More often, you’ll deliberate ad nauseam. Do you book? Do you wait? Can anyone actually beat airlines at their own game?Most Read from BloombergWarner Bros. Nears Deal for Harry Potter Online TV SeriesChina’s Yuan Replaces Dollar as Most Traded Currency in RussiaGoogle Wants You to Never Overpay for a Flight AgainOPEC+ Makes Shock Million-B