Continental joins United, JetBlue, Virgin America and some other US domestic airlines in selling economy class seats with extra leg room. These seats will become available for purchase 24 hours before the flight's scheduled departure. The seats will have a minimum of seven additional inches of legroom, according to Continental's web site announcement, and the cost will vary depending on length of flight and route. Passengers who are members of the airline's frequent flyer program and who fly more than 25,000 miles per year can select these seats at no additional charge, on a first check in, first served basis. No word when the airline's entire fleet will be reconfigured with the new seats.