KLM Airlines Reservations When passengers book a trip with KLM Airlines, they want to organize everything. That's why KLM has it all, from seat upgrades to express check-ins for your reservation. Please visit the official website to complete the Manage KLM Airlines reservation process. It would be better if you follow the methods below. Step-by-step procedure for booking KLM flights: First, open a browser and go to the official KLM Airlines website. Second, go to the home page header and select My Trips. Third, provide the reservation code and the last name of the passenger. Also, use the search button to find information about KLM airline reservations. Select the KLM Management Reservation option. Here you can find renewal booking, flight cancellation or change, KLM booking transfer, online check-in or any other services. Whichever service you choose, you must follow all the necessary steps. The main goal was to complete the KLM service and go to the order summary page. You must make a payment to complete the transaction. Finally, email. You will receive a confirmation email at your registered email address. Email address. You can also contact customer service to start and complete the managed buying process.