Https://discussions.trendmicro.com/en-us/forums/pc-security/af75a62f-e899-ef11-95f5-002248ef6e99 (KLM~Cancel, Refund) 1-844-949-8748 What is the 24 hour rule for KLM? KLM's 24-hour rule allows passengers to make free changes (Call- 1-844-949-8748 Book, Cancel, Refund) or cancellations to their bookings within 24 hours of purchase, provided that the departure date is at least 7... https://discussions.trendmicro.com/en-us/forums/pc-security/af75a62f-e899-ef11-95f5-002248ef6e99