The carrier Tuesday said that its test pilot using the technology has been so successful that it's adding Wi-Fi on its domestic Boeing 737-800s and MD-80s planes over the next two years. Wi-Fi capabilities will be added starting this year.

Aircell, based in Itasca, Ill., is providing the service through its Gogo technology on 300 AA planes. The company has built a network of wireless antenna sites across the U.S. to link airplanes to the Internet. A Wi-Fi hotspot in the cabin allows passengers to connect to the service.

The broadband system is based on 3G cell technology. The company won the exclusive rights to use the FCC's air-to-ground communications frequencies in an auction in 2006.

Fliers using the service will pay $12.95 on transcontinental flights that are more than 1,150 miles and $9.95 for service on shorter flights. Customers using handheld devices will pay $7.95 for short and long flights.

American trialed the service last year and already offers it on coast-to-coast flights on Boeing 767s. Virgin Airlines also offers Wi-Fi, as does Delta Airlines, which said it has equipped 77 planes, or 25 percent of its domestic aircraft. In January, United Airlines said it will begin offering Wi-Fi service to customers on its p.s. transcontinental service between New York and California starting in the second half of this year.