Delta plans to offer Wi-Fi on all domestic flights by the end of September, and Virgin America will by the end of June. Aircell provides the service on both airlines; Aircell charges $10 for flights of less than three hours, $13 for longer flights, and $8 for hand-held devices.
American offers Wi-Fi on several dozen flights and will have more than 150 planes with Wi-Fi by the end of the year. Southwest is testing Wi-Fi on four planes, through Aircell rival Row 44, and plans to add more service later this year.
Air Canada and United have no Wi-Fi access but have contracted with Aircell to add it later this year. Continental and U.S. Airways won't disclose any specific Wi-Fi plans. JetBlue, surprisingly, is also a laggard. It has instant messaging and e-mail on one plane and plans to start adding those services -- but not full Internet access -- to other aircraft later this year. The service will be free.