You can contact Lufthansa to change your flight by calling their customer service or by visiting their website. Here are the steps:

Visit Lufthansa's website: Go to the Lufthansa Change Flight +1-860-498-9674
Click on "My Bookings": Click on the "My Bookings" tab on the homepage.
Enter your Booking details: Enter your booking reference number and your last name to access your booking.
Select the flight you want to change: Click on the flight you want to change and select "Change Flight."
Choose a new flight: Select a new flight that fits your schedule and preferences.
Confirm the changes: Review the changes and confirm that you want to make them.
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