Only four of the country's 15 airports -- Incheon and Gimpo in the Seoul area ... birds located at a distance from the airport and enable the control tower to issue early warnings to aircraft ...

However, just three minutes later, the airport's control tower warned of the possibility ... additional measures", but the pilot returned to Gimpo Airport near Seoul out of caution.

Japan Airlines System (JAL) and All Nippon Airways (ANA) have sought permission from Japan's Ministry of Transport to operate charter flights between Tokyo's Haneda Airport and Seoul's Gimpo ...