https://cancellationflights.com/klm-cancellation-charges/
KLM airline reservations ticket are non-refundable, if it's been more than 24 hours of the booking. KLM cancellation charge & airlines reservations ,cancellation policy can only be made within 24 hrs of flight reservations to request for full refund. For more information and assistance, passengers are highly recommended to contact the airline using its helpline number. Additionally passengers can also make use of official contact email to send cancellation and refund request.
Those passengers who are willing to do Spirit Ticket Cancellation , can do it online using “manage booking” option. Please note, passenger would be required “confirmation number” to make the cancellation. +1-800-847-2317
