Will I need to pay a fare difference when changing a Lufthansa flight?

In many cases, yes. When changing a Lufthansa flight, any fare difference between the original and new flight must be covered by the passenger. While some tickets allow fee-free changes, the price difference is usually payable if the new flight costs more. To avoid surprises, check your fare details before initiating a Lufthansa flight change. If the new fare is lower, though, Lufthansa typically doesn’t refund the difference.