. Ten Boeing 737 -300s were ordered a few days later. All of the aircraft were delivered between 1987 and 1992 . Lufthansa also bought Airbus A321 , Airbus A340 and the Boeing 747-400 . Lufthansa Boeing 747-400 Lufthansa Airbus A340-600 Lufthansa Airbus A300-B4 Lufthansa A320-200 Lufthansa Airbus A321-100 Retrojet Lufthansa A321-100