Let’s face it: Long layovers are the worst, and sometimes, leaving the airport really isn’t an option. I had one such layover recently, and I discovered that some airport hotels book rooms by the hour. You can save money over the hotel’s standard rate, check in when you need to, and, especially when the hotel is right in the terminal, you can just turn up when it’s time to board your flight. While not exactly cheap, it’s a little luxury that can make a hard travel day much more manageable. Here’s how to find one and tips for booking.