Lufthansa Airlines Manage Booking: Modify & Change Flight. Call Lufthansa Manage Booking phone number +1-860-370-4608. Managing your booking with Lufthansa Airlines is a simple and convenient process that allows you to make changes, update information, and customise your travel experience. Whether you need to select seats, change flight dates, or request special services, Lufthansa's online tools make it easy to take control of your journey. Here's a step-by-step guide on how to manage your booking with Lufthansa Airlines: