Do your own everything. Have an Internet connection? Use it. Many airlines charge a premium any time you interact with an employee, such as booking a reservation over the phone (instead of online). In fact, US Airways now charges $5 extra to passengers who check a bag at the airport (vs. doing it in advance online). And low-cost European carrier Ryanair announced it was mulling a £1 fee to use the aircraft lavatory. If airlines could find a way to make you fly the plane, they would — and they'd charge you if you couldn't.