To get a sense of the Airbus A380’s size and ambition, walk up the grand staircase of an Emirates version of the aircraft, past the showers and the first-class suites and then through endless rows in business class to the bar at the back of the upper deck. This sleek semicircle, alluringly underlit and fully stocked with pricey spirits like Grey Goose vodka, is undoubtedly one of the defining features of this aircraft, which can hold more than 500 passengers. The plane dwarfs every commercial jet in the skies.

Since it started flying commercially seven years ago, the A380 has caught the imagination of travelers. Its two full-length decks total 6,000 square feet, 50 percent more than the original jumbo jet, the Boeing 747. Its wingspan barely fits inside a football field. Its four engines take this 560-ton airplane to a cruising altitude of 39,000 feet in less than 15 minutes, a surprisingly smooth ascent for such a bulky plane. Passengers love it because it’s quiet and more reminiscent of a cruise ship than an airplane.

The A380 was also Airbus’s answer to a problematic trend: More and more passengers meant more flights and increasingly congested tarmacs. Airbus figured that the future of air travel belonged to big planes flying between major hubs. “More than simply a big airplane,” one industry analyst wrote when the first A380 was delivered to Singapore Airlines in 2007, “the newest industry flagship will change forever the way the industry operates.”

The prediction hasn’t exactly come true.

Airbus has struggled to sell the planes. Orders have been slow, and not a single buyer has been found in the United States, South America, Africa or India. Only one airline in China has ordered it, and its only customer in Japan has canceled. Even existing customers are paring down orders.