Airlines operating routes between Korea and the USA are changing flight paths to avoid areas that may be exposed to missile launches from North Korea.
"At the moment, no one is changing any routes or operating parameters", the Hong Kong-based airline said in a statement.
Described by Pyongyang as its "most powerful" missile, the 29 November launch ended up in Japanese waters but flew higher than any other the North had previously tested.
The carrier said its planes now don't enter "the vicinity of the missile trajectory", because it changed the route to avoid the northern part of the Sea of Japan, which sits between the Korean Peninsula and Japan.
The decision was reportedly made after the North fired a missile into the East Sea on July 28th.
The test-launch raised tension further with South Korea and the United States, who on Monday began their largest ever joint air exercise, which the North has branded an "all-out provocation".
Countries are required to give warnings about their upcoming missile tests as per worldwide agreements.
The International Civil Aviation Organization in October had condemned the missile tests as it threatened the safety of commercial flights but it had little effect on the North Korean regime.
Federal regulation from 1997 prohibits all USA airlines from flying over the Flight Information Region of Pyongyang.
Korean Air said the pilots on two of its flights bound for Seoul "saw a flash and everyone is assuming it should be the missile because of the timing".
The chances of one of Kim's missiles actually hitting a civilian plane is very low, experts said.