Atatürk Airport

Atatürk Airport is the primary international airport serving Istanbul, Turkey, and functions as the novel's final logistical and emotional hub. It is the arrival point for the WHO's C-130 transport plane carrying Elizabeth Sinskey, Robert Langdon, and the SRS team, and the departure point for Langdon's return to Florence and Sienna's flight to Geneva. The airport's private terminal and government hangar become the stage for the provost's attempted escape and arrest, and for the emotional farewell between Langdon and Sienna, marking the transition from the crisis in the cistern to the aftermath of Zobrist's plague.

Arrival and the Descent into the Cistern

The C-130 carrying Sinskey, Langdon, and the SRS team descends through a gathering storm front on final approach to Atatürk Airport. From the jump seat in the cockpit, Langdon peers out through the windshield, relieved to have a view after the windowless fuselage. He sees the lights of Istanbul, a glistening, horn-shaped peninsula jutting into the blackness of the Sea of Marmara, with the Bosporus waterway appearing as a wide gash that severs the city in two. The plane touches down, brakes hard, and taxis to a remote hangar, where it comes to a stop. Langdon half expects an army of WHO employees in hazmat suits, but the only party awaiting their arrival is the driver of a large white van bearing the emblem of the Swiss embassy. Sinskey explains that they have decided against alerting local authorities, preferring to keep the operation quiet to avoid widespread panic. Brüder and his team zip up large black duffel bags containing hazmat gear, biosuits, respirators, and electronic detection equipment. The plan is to enter Hagia Sophia, find Dandolo's tomb, listen for water as the poem suggests, and then reassess. Sinskey has arranged a private VIP tour through a contact in the Swiss embassy, telling the museum that a famous American professor had flown in to write an article on the symbols of Hagia Sophia. The museum sends an employee named Mirsat to meet them, a fan of Langdon's writings on Islamic art.

The Provost's Arrest and the Consortium's Collapse

While Langdon, Sinskey, and Brüder are at the cistern, the provost and Ferris remain aboard the C-130, which is parked inside a government hangar at Atatürk Airport. The provost senses he is being held captive, and his uncertainty about his future settles in. He reflects on his career, realizing that every epic collapse can be traced back to a single moment—in this case, the moment he agreed to hire a young med school student named Sienna Brooks. The provost's reflections are interrupted by a flurry of panicked calls among the WHO staff, who learn that Sienna Brooks has departed Italy and landed at Hezarfen private airfield, only fifteen miles from the airport. Suddenly, the sharp clang of metal on metal rings through the fuselage as someone bangs the butt of a pistol against the aircraft's hatch. The pilot opens the door to find two uniformed Turkish police officers who present arrest documents for the provost and Ferris. The officers claim that Dr. Sinskey herself ordered their arrest, naming them as conspirators in a bio-terrorism plot on Turkish soil. The provost and Ferris are shackled, muscled down the gangway, and shoved into the backseat of a black sedan. The sedan races to a remote corner of the airport, where it stops at a chicken-wire fence that has been cut and pulled apart. Once through the perimeter fence, the car bounces across a dusty wasteland of broken airport machinery and comes to a halt near an old service building. The two uniformed men strip off their police uniforms, remove the handcuffs, and reveal themselves to be Consortium agents. They provide the provost and Ferris with a white van containing travel documents, cash, prepaid phones, clothing, and a small bottle of Highland Park single malt. The provost takes a deep pull on the bottle, but the darkness suddenly lights up with spotlights and blue flashing strobes of police cars that surround them on all sides. As armed Turkish police officers approach the van, rifles extended, the provost takes a final sip and quietly raises his hands over his head, knowing that this time the officers are not his own.

Departure and Farewell

In the predawn air, a light fog hugs the tarmac around the private terminal. Langdon, Sienna, and Sinskey arrive by town car and are met by a WHO staffer. Sinskey confirms that Langdon's arrangements are in place: a private plane to Florence, with his temporary travel documents already on board. She also confirms that the package Langdon requested—Dante's death mask—is being shipped as soon as possible. Sinskey heads across the terminal, reaching into her pocket and pulling out the two halves of her broken amulet, clutching them tightly in one palm. Langdon calls out to her not to give up on the rod of Asclepius, and she replies that she is hoping everything is fixable. Sienna stands alone at a large window, gazing out at the lights of the runway, which look ghostly in the low-lying fog and gathering clouds. Atop a control tower in the distance, the Turkish flag flutters proudly—a field of red emblazoned with the ancient symbols of the crescent and star. Langdon joins her, and they share a long, emotional farewell. Sienna stands on her tiptoes and kisses him full on the lips, then whispers that she will miss him. Langdon wraps his arms around her and quotes an ancient saying attributed to Dante: "Remember tonight… for it's the beginning of forever." Sienna walks alone toward the waiting C-130, praying that Dante was right. As she climbs into the plane, she considers everything that has happened and all the possible futures, feeling for the first time that she has a purpose.