Stay away from the Lufthansalounge in terminal Z. It is seriously overcrowded (I'm thinking a fire hazard) and since too many people are online, the internet is horribly slow. Stay away!
If you have a connection here leave yourself at least 2 hours. Everyone is slow and rude and you will end up walking 2 miles to your gate. Its terrible.
Frankfurt Airport is Germany's largest aviation hub with more than 70 million passengers in 2019. More than 100 airlines fly to 275 destinations in 111 countries with approximately 1,400 flights per day.