BRUSSELS—Lufthansa CEO Carsten Spohr called for greater cooperation between airlines and airports in the face of an upcoming capacity crunch, likening current strained relations to a sibling rivalry. “We are jointly facing a unique crisis many other industries would envy us for: a crisis of growth. I believe that with the way we are set up today—and working together today—we will not cope with that growth,” Spohr said during a keynote address at the ACI Europe ...