Changing your KLM flights and adding extra options can be done through the airline's website or by contacting their customer service team. Here's a step-by-step guide on KLM Change Flight and add extra options:

• Visit KLM's website and click on "My Trip" at the top of the page.

• Enter your booking code and last name to access your booking details.

• Select the flight you want to change and click on "Change flight."

• Choose the new flight that suits your needs and click on "Continue."

• Review the summary of the changes you have made and click on "Next" to proceed to the payment page.

• If there is a price difference between your original and new flights, you will need to pay the additional amount. You can make the payment using your preferred payment method.

• Once your payment has been processed, you will receive a confirmation email with your new itinerary.

To add extra options such as extra baggage allowance or seat selection, follow these steps:

• Visit KLM's website and click on "My Trip" at the top of the page.

• Enter your booking code and last name to access your booking details.

• Select "View or modify" to access the details of your flight reservation.

• Choose the extra options you want to add, such as extra baggage allowance or seat selection.

• Review the summary of your extra options and click on "Next" to proceed to the payment page.

• Make the payment for the extra options using your preferred payment method.

• Once your payment has been processed, you will receive a confirmation email with the updated details of your flight reservation.

• If you prefer, you can also Talk to a Live Person at KLM Airlines team to change your flights and add extra options. They will assist you with the process and answer any questions you may have.