Delta has announced it will end flights between Japan and Guam because of low demand just days after another airline delayed Japan-Guam flights because of North Korea's threat to attack the US island territory. Demand was not strong enough for Delta to maintain the route and the last flight will take place in January, said airline spokesman Hiroko Okada. The carrier's decision leaves United as the only US airline with flights between Guam and Japan. Japan Airlines also has flights from Narita airport to Guam. Delta's decision came after HK Express delayed Japan-Guam flights until next summer, "citing geopolitical concerns in the region." North Korean leader Kim Jong Un has threatened Guam. The country has fired two missiles over Japan including one launched on Friday.<br/>