Rental-car companies pay concession fees to operate at the airport, and they have the right to pass these costs on to you, the customer.
The cost: As much as 30 to 40 percent more than the base rate at a rental location just outside the airport. For example, expect to pay almost $300 more a week when renting from the Hertz LAX airport location compared with the downtown Los Angeles location, 10 miles away.
How to get around it: Do a cost comparison. Chances are, it will be cheaper to rent off the airport grounds, even if you have to take a taxi or―even better―a free shuttle bus to the other location.
In hotels without a wireless Internet connection, you may be charged for using the phone line with your computer modem. If you use it for at least 20 minutes, you’ll be charged a long-distance rate or a flat fee that’s usually around $25.
The cost: $1 to $2.50 a call (including 800 numbers).
How to get around it: If you plan on using a modem, ask about the charges for this before your make your reservation, and write down the day, the time, and the name of the reservationist, in case you need to dispute a charge.