What is KLM's Policy on Flight Changes?
Changing a trip is easy, but it may be costly if you are ignorant of the KLM Airlines restrictions and limitations that apply to each passenger. Before making any changes to your booking, you should be aware of the KLM flight change policy. You may learn more about the flight change policy by reading the instructions below:
KLM does not charge a change fee if you change your flight within 24 hours of booking your ticket.
You must pay the necessary flight change charge if you alter your KLM ticket after 24 hours after booking.
According to the flight change policy, you can even alter the date of your flight for free if it is delayed for more than 3 hours.