Two local airliners are canceling flights to Taiwan after China began carrying out military drills in the area .
Korean Air canceled flights between Incheon and Taiwan on Friday and Saturday, while delaying Sunday's flight schedule by one hour.
Asiana moved up Thursday's flight by three hours and canceled Friday's direct flight to the island state.
The company plans to monitor the situation before making decisions on operating flights this weekend.
People who made reservations can either move their flight to Sunday or get a full refund.
Flights to Taiwan with other airlines operating out of Incheon or Gimpo airports are operating as normal.