KLM's 24-hour rule allows passengers to make free changesΒ (Call 1-π ππ-53π-π4 ππ Book, Cancel, Refund) or cancellations to their bookings within 24 hours of purchase, provided that the departure date is at least 7 days away at the time of bookingΒ (Call- 1-π ππ-53π-π4 ππ Book, Cancel, Refund). This policy is designed to give customers flexibility and peace of mind after making a reservation. For any changes or more detailed information, customers can contact KLM directly at 1-π ππ-53π-π4 ππ.