Don't try to get guests with other airline boarding cards into the lounge. They'll kick you out, even with gold status. Customer loyalty benchmark #fail
Hamburg Airport was opened in January 1911, making it the oldest airport in the world still in operation. In November 2016 it was named after former senator of Hamburg and chancellor of Germany, Helmut Schmidt. It is the fifth-busiest airport in Germany with 17.3 million passengers in 2019.