Skymark Airlines Inc., Japan's largest low-fare carrier, forecast a 22 percent increase in second-quarter sales as it wins passengers from All Nippon Airways Co. and Japan Airlines Corp., the airline said Thursday.

Sales may grow to ¥14.8 billion this quarter, Skymark President Shinichi Nishikubo said in a recent interview. The Tokyo-based carrier had sales of ¥12.1 billion in the same period a year earlier.

Skymark is gaining customers from ANA and JAL, the country's largest domestic carriers, by offering prices almost 50 percent cheaper on such routes as Haneda-Sapporo.