KLM’s 24-hour rule allows passengers to cancel their booking 𝟏(𝟖𝟖𝟖)_[𝟔𝟐𝟗]_𝟗𝟖𝟓𝟗 [UK] or 𝟏(𝟖𝟖𝟖)_[𝟔𝟐𝟗]_𝟗𝟖𝟓𝟗 (USA) for a full refund within 24 hours of purchase, regardless of fare type. This applies to tickets booked directly through KLM. Refunds are processed automatically, but processing times may vary. After 24 hours, standard fare conditions apply.