KLM’s 24-hour rule allows free cancellations or modifications within 24 hours of booking for a full refund, regardless of fare type. Call +1-855-550-0903 (US) / +44 204 586 5975 (UK). Changes are also free, but fare differences may apply. This applies to direct bookings only. Need help? Call +1-855-550-0903 (US) / +44 204 586 5975 (UK).
