Lufthansa Airlines allows passengers to move to higher class seats if they have booked the regular class of the aircraft, using the upgrade option. Travelers can request an upgrade using miles, place a bid, or pay in cash during check-in. The Upgrade Lufthansa Flight option can be done through the official website or with the help of the customer support desk. For more information on upgrades, one can contact Lufthansa customer service or read the blog at the mentioned link by Airlines Group Travel.