If you visit Prague you may have the misfortune of flying in or out of Franz Kafka International, where the average customer can expect 31-hour delays. If you plan to take luggage with you, make sure it's empty (that's a rule) and get there early to find your way around cause Gate B1 is in the F terminal.
You may think this would all lead to an overwhelming volume of calls for the airport customer service line, but it redirects the caller to a hat store in Stuttgart, so it's not a problem. If you want to complain in writing you are urged to send a letter to the hospital you were born in.
If you do have an overnight delay, beware the nearby Dostoyevsky hotel, in which people check in and end up murdering other guests.