You may change the date, time, or where you are flying to. Sometimes you have to pay a fee to change it.KLM Ticket Change Fee depends on your ticket type and fare class. If your new flight costs more, you will have to pay the difference. The rules are different for every ticket. You can usually change your flight online on the KLM website or contact KLM Airlines customer service at +1-877-350-4939.
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