The 747's are used for their extensive trans-pacific routes. All trans-pacific flights go through Tokyo (NRT). U.S. origins are Detroit, Minneapolis, Las Vegas, LAX, Seattle, Hawaii, New York, and I may be missing one or two. Pacific destinations are Seoul, Shanghai, Bangkok, Manila, Tokyo, Osaka, Singapore, Guam, Tapeii, Beijing, and again, I may be missing one or two. Of course the 744's are used for the longer routes such as JFK to NRT. Hope this helps. It truly is an awesome sight to see 8-10 NWA 747's (as well as as an equal number of United Airlines 744's) sitting at Narita.