South Korea, Strike, Level 3: Strikes with possible effects on multiple airports between 19 September and 9 October – South Korea [Update 2] September 18, 2025September 18, 2025 [email protected]Travel Alert Update 2025-09-18: Travellers in and heading to South Korea should bear in mind that employees at several major airports in the country have announced that they will be striking from Friday (19 September) to Thursday (9 October).