Know the geographic boundary before choosing a route
Current AMC terminal guidance states that qualifying disabled veterans who are not otherwise traveling as retirees may travel within CONUS; directly between CONUS and Alaska, Hawaii, Puerto Rico, the U.S. Virgin Islands, Guam and American Samoa; and within Alaska, Hawaii, Puerto Rico or the U.S. Virgin Islands. Guam and American Samoa travelers may transit Hawaii or Alaska.
That is why a route to Japan, Korea or Europe should not be treated as eligible merely because the traveler can see it on an AMC schedule.