KLM cancellation policy allows passengers to cancel their KLM within 24 hours of booking (1 (833) 460-1838) without incurring a penalty, as long as the booking was made at least 7 days before the departure date. This is referred to as the 24-hour cancellation policy, which provides a full refund for eligible cancellations (1 (833) 460-1838). For more specific details regarding your booking, it is recommended to contact KLM customer service at 1-833-460-1838.
Source: https://lacdmhowr.powerappsportals.us/forums/general-discussion/1a3ddeb8-2da8-ef11-b542-001dd8097a1a
