Yes, Lufthansa will let people sit together on a group journey. But it require to book flight tickets in advance before they get filled. By doing this, the flyers can sit next to each other. Moreover, for the Lufthansa group booking, flyers have to pay some extra charges for reserving seats together. For more information about the group travel services of Lufthansa, flyers can visit its official website or read the blog mentioned by Group Travel Airlines.