KLM 24 Hours Cancellation Policy: KLM extends a 24-hour grace period, enabling passengers to amend or cancel reservations without penalty shortly after booking. Stay flexible and consider this when planning your itinerary.

https://www.lowfaresfinder.com..../blogs/can-you-cance

How To cancel your KLM Flights and Extra Refund Options?

Want flight cancellation and also get a refund? Find out more about the KLM flight cancellation/refund policy, COVID travel waivers, and other topics