It hadn't previously announced the changes before this week.
Singapore Airlines has reportedly changed the route its planes fly between Asia and the United States because it feared its fleet would be struck by a North Korean missile.
Cathay is said to be planning to offer satellite phones to its crew on flights between South Korea and Hong Kong. North Korea joined the ICAO in 1977, but the last time it warned the organization of an impending missile launch was in February 2016.
"At the moment, no one is changing any routes or operating parameters". "We remain alert and (will) review the situation as it evolves".
Rob Gronkowski suspended one game
His appeal not going through will ensure he misses at least two games in a season for the fourth time in his eight-year career. WROC-TV in Buffalo caught Belichick and Bills coach Sean McDermott's interaction on the field immediately after the game.
In a leaked internal memo, the airline's general manager for operations, Mark Hoey, told the staff, "Today [date unspecified] the crew of CX893 reported, 'Be advised, we witnessed the DPRK missile blow up and fall apart near our current location.'" The Democratic People's Republic of Korea or DPRK, is the official name for North Korea.
The North Korean missile was sacked very high up, reaching an altitude of 4,475 kilometers (2,780 miles) before falling back into the Sea of Japan about 950 kilometers (600 miles) from where it was launched. The flights, one from San Francisco and the other from Los Angeles, were both headed for Incheon, the main airport serving Seoul, South Korea. Cathay Pacific's crew reported seeing the weapon re-enter the Earth's atmosphere, while Korean Air said its pilots "saw a flash".
The United Nations aviation agency is not considering the creation of a "no-fly" zone around North Korea because the direction of Pyongyang's tests are not predictable, two sources familiar with the organization's thinking said on Thursday. The chances are "billions to one", aviation safety analyst David Soucie told CNN. "That would still be low probability but more risky".