Preparing for an early spring getaway? Well, watch what you pack. Due to rising gas costs, airlines are finding new ways to offset costs. And one of the ways to do that is to charge for extra luggage. According to an article on MSNBC, northwest airlines says it will begin charging $25 for a second piece of luggage for flights within North America.

The charge goes into effect May 5 and applies each-way on a two-way trip. Several other carriers are adding an extra charge for a second checked bag including US Airways and United Airlines.

Northwest's high-end frequent fliers and full-fare passengers can still check two bags without paying extra. First-class passengers get three bags for free.

Northwest is also going to start charging $50 for bags over 50 pounds. The old fee was $25.