Yes, you can change the Date on your Klm FLIGhts ticket, but it is subject to certain conditions and fees. You will need to contact Klm FLIGhts customer service at??((+1-877-552-0621}}(????????????) or ?? ((+1-877-552-0621}} (OTA) to request a Date change and provide the necessary information. Yes, you can change the Date on your Klm FLIGhts ticket, but it is subject to certain conditions and fees. You will need to contact Klm FLIGhts customer service at??((+1-877-552-0621}}(????????????) or ?? ((+1-877-552-0621}} (OTA) to request a Date change and provide the necessary information. If you need assistance with changing passengers on a Klm ticket, please contact Klm Customer service at ??((+1-877-552-0621}}(????????????) or ?? ((+1-877-552-0621}}. Please provide your reservation details and reason (divorce, marriage, etc.) for Date change on your Klm ticket. Date changes on Klm. tickets may be subject to penalties according to pricing guidelines.