You’re at the airport, ready to start a two-week business trip. But the check-in kiosk isn’t finding your ticket. You go to the counter. The representative is at first cheerful, then confused. She calls to her supervisor. Somehow, despite the printed confirmation in your hand, there is no ticket for you in the computer. You protest, politely, but the representative is firm: for reasons unknown, you have no ticket, and if you want to buy one now, it will cost you $4,000.59. One way. In addition to what you’ve already paid.