The Wall Street Journal reports that broadband service providers are building up wireless capability on commercial airplanes, one of the last remaining places where it can be difficult to find a reliable, high-speed Internet connection:

On Tuesday, US Airways finished installing wireless Internet capability on its 51 Airbus A321 aircraft, narrow-body planes primarily used on transcontinental domestic flights, and is providing the service free to passengers until June 8. If demand is strong enough, the airline will consider expanding the service to some of its other narrow-body Airbus aircraft, according to a US Airways spokesman.

US Airways has been working with airplane wireless provider Aircell LLC, whose Gogo Inflight Internet service has already been installed on 930 planes for eight different airlines.

In addition, fellow airplane wi-fi provider Row 44 Inc. is working to have all of Southwest Airlines’ planes connected over the next 18 months.

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