How much do Korean Air charge you to change the date of a flight?

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On Korean Air, you can change your flight date, but a fee may apply. The amount depends on your ticket type and whether it's a domestic or international route. But on average, the Korean Air Change Flight Date Fee starts from $40. Further, you might also need to pay the fare difference if the new ticket costs more. Besides, when you have purchased a flexible fare, the fee may be lower or even waived.