KLM flight change policy allows passengers to modify their travel dates, times, or destinations with ease. Depending on the ticket type, changes may be free or subject to a fee. For changes within 24 hours of booking, no penalty applies. KLM offers both online and customer service assistance for modifications. Passengers can manage changes through the website, mobile app, or by calling KLM’s support team at +1-866-679-5070 for guidance, fees, and updated flight options under the airline’s flexible travel policies.