All Nippon Airways Co is planning to halt, reduce or increase flights on a total of 28 routes in Japan this year in its largest-ever realignment of domestic flights, ANA officials said on January 10.

Behind the realignment covering more than 20 percent of ANA's domestic routes is the air carrier's anticipation of fiercer competition with its rivals after the planned expansion of Haneda and Narita airports in fiscal 2009 to March 2010.