What is the 24-hour rule for KLM? KLM's 24-hour rule permits travellers to make changes to their bookings or cancel their flights by phone at " 1-855-838-4962  OR   ＋１－８５５－８３８－４９６２ (US)" inside 24 hours of buy without causing any punishments (Charges) or expenses.   What is the 24-hour rule for KLM? KLM's 24-hour rule allows you to cancel your +1-855-838-4962. flight reservation or make changes to your booking +1-855-838-4962 within the first 24 hours of purchase without any penalty fees, as long as your flight is at least 7 days away. To cancel or change your reservation, call KLM at +1-855-838-4962 OR  {{[FAQs~HELP™]}} Is KLM airlines open 24/7?   What is the 24-hour rule for KLM? KLM's 24-hour rule permits+1-855-838-4962 travellers to make changes to their bookings+1-855-838-4962 or cancel their flights by phone at " 1-855-838-4962  OR   ＋１－８５５－８３８－４９６２ (US)" inside 24 hours of buy without causing any punishments (Charges) or expenses.   What is the 24-hour rule for KLM? KLM's 24-hour rule allows you to cancel+1-855-838-4962 your flight reservation or make changes to your booking+1-855-838-4962 within the first 24 hours of purchase without any penalty fees, as long as your flight is at least 7 days away. To cancel or change your reservation, call KLM at  1-855-838-4962  OR   ＋１－８５５－８３８－４９６２.   What is the 24-hour rule for KLM? KLM's 24-hour rule permits travellers to make changes to their bookings+1-855-838-4962 or cancel their flights by phone at " 1-855-838-4962  OR   ＋１－８５５－８３８－４９６２ (US)" inside 24 hours of buy without causing any punishments (Charges) or expenses.   What is the 24-hour rule for KLM? KLM's 24-hour rule allows you to cancel your flight reservation or make changes to your +1-855-838-4962 booking within the first 24 hours of purchase without any penalty fees, as long as your flight is at least 7 days away. To cancel or change your reservation, call KLM at  1-855-838-4962  OR   ＋１－８５５－８３８－４９６２. klm phone number 24/7 Lost baggage KLM phone number KLM customer service email KLM Netherlands contact number KLM customer care Number #KLMPhoneNumber #KLMcustomerservice