A KLM statement issued in advance of the strike day read, “Due to a strike by KLM ground staff scheduled for Wednesday, September 17th, from 08:00 to 12:00 CET, we have unfortunately had to cancel around 100 flights. Nigel Wiggins / ShutterstockOver 100 flights affectedIn total, KLM was forced to cancel 104 flights, amounting to 15% of its scheduled departures, on September 17, 2025. The strike action is the latest chapter in a long-running dispute between KLM and several labor unions representing ground crew workers at Amsterdam Schiphol Airport. Ongoing strike actionThe latest strike day follows two days earlier in September when KLM ground workers abandoned their posts and went out on strike. Due to a planned Union strike of KLM ground staff, your KLM flight may be impacted on this date and on the days before and after.”“Please regularly check updates on your flight status in the KLM app and the KLM website.