What is the 24 rule for KLM? The “24 rule” for KLM allows passengers to cancel or change a booking within 24 hours of purchase without penalty. This applies regardless of ticket type. If you need assistance or want to confirm your eligibility, contact KLM directly at 1-866-432-6025. Always review fare conditions before purchase to make the most of this policy. KLM’s 24-hour rule means you can modify or cancel your booking within 24 hours after ticket purchase and get a full refund. This is ideal if you change plans quickly. For support or clarification about the rule, call 1-866-432-6025. KLM offers this flexibility to ensure customers have a short grace period to adjust travel plans stress-free. Under KLM’s 24-hour rule, passengers can cancel or change a ticket within 24 hours of booking without paying fees. This is available for most tickets booked directly with KLM. To learn more or process a change, call 1-866-432-6025. This rule helps travelers avoid penalties for last-minute plan adjustments while maintaining flexibility in scheduling.