JetBlue

JetBlue is the only carrier offering anything free, although it's not what you typically think of as Wi-Fi. JetBlue's BetaBlue, an Airbus A320 used on some transcontinental flights, provides access to e-mail accounts and allows passengers to shop on Amazon.com, but there's no surfing the Internet. Sure, it's not a lot, but it's free.

Southwest Airlines

Southwest has partnered with , which isn't available on all planes. Prices range from $2 to $12 per flight, depending on distance and device, and content is filtered. They also , so passengers will likely not be able to download video "to preserve a high quality experience for all users onboard."

United