Question: Germanwings destinations was incorporated in to the German airline headquartered in what city in 2016?

Context paragraphs:
Air Costa: Air Costa was an Indian regional airline headquartered in Vijayawada and based out of Chennai Airport.  It was owned by Indian business company LEPL Group.  The airline commenced operations as a regional airline in October 2013 using two Embraer E-170 aircraft with the first flight taking off from Chennai on 16 October 2013.  The airline got a permit for pan India operations in October 2016.  The airline focused on connectivity between tier II and tier III cities in the country and invested as of 2015.  Air Costa operated 32 daily flights to nine destinations from its focus cities Chennai and Vijayawada as of 2015.  The airline had a maintenance center in Chennai.  On 28 February 2017, it suspended operations until further notice.

Germanwings Flight 9525: Germanwings Flight 9525 (4U9525/GWI18G) was a scheduled international passenger flight from Barcelona–El Prat Airport in Spain to Düsseldorf Airport in Germany.  The flight was operated by Germanwings, a low-cost carrier owned by the German airline Lufthansa.  On 24 March 2015, the aircraft, an Airbus A320-211, crashed 100 km north-west of Nice in the French Alps.  All 144 passengers and six crew members were killed.  It was Germanwings' first fatal crash in the 18-year history of the company.

Eurowings: Eurowings GmbH is a German airline headquartered in Düsseldorf and a fully owned subsidiary of the Lufthansa Group.  It serves a network of domestic and European destinations as well as some long-haul routes and maintains bases at Berlin Tegel Airport, Cologne Bonn Airport, Düsseldorf Airport, Hamburg Airport, and Vienna International Airport.

China Southern Airlines: China Southern Airlines Company Limited is an airline headquartered in Baiyun District, Guangzhou, Guangdong Province, China.  Established on 1 July 1988 following the restructuring of the Civil Aviation Administration of China that acquired and merged a number of domestic airlines, the airline became one of China's "Big Three" airlines (alongside Air China and China Eastern Airlines), the world's fourth-largest airline measured by passengers carried and Asia's largest airline in fleet size, revenue and passengers carried.  With its main hubs at Guangzhou Baiyun International Airport and Beijing Capital International Airport, the airline operates more than 2,000 flights to 208 destinations daily as a member of SkyTeam.  The logo of the airline consists of a kapok flower (which is also the city flower of Guangzhou) on a blue tail fin.

Germanwings destinations: As of October 2015, German low-cost carrier Germanwings serves the following destinations.  During 2016, the network will be incorporated into Eurowings.

Hahn Air: Hahn Air is a German airline headquartered in Dreieich, offering scheduled and charter flights within Europe from its base at Düsseldorf Airport.

List of Cathay Dragon destinations: Hong Kong Dragon Airlines Limited, operating as Cathay Dragon (previously as Dragonair), is an international airline headquartered in Hong Kong, with its corporate headquarters, Dragonair House, and main hub at Hong Kong International Airport.  s of 30 2013 , the airline operates a scheduled passenger service to 44 destinations in 13 countries and territories across Asia.  Additionally, 3 other destinations in the network are served by partner airlines using codeshares.  The airline was founded on 24 May 1985 by Kuang-Piu Chao, the airline's present honorary chairman.

Sun Country Airlines: Sun Country Airlines is an United States based airline headquartered in the Minneapolis–Saint Paul suburb of Eagan, Minnesota and based at nearby Minneapolis–Saint Paul International Airport.  The airline's main focus is flying Minnesotans to warmer destinations during the winter months, such as Florida and Mexico.  In the summer months, the airline flies passengers between the Twin Cities and the east and west coast in the U.S. Sun Country also operates flights from Dallas/Fort Worth which serves as a focus city for the airline.  It operates scheduled and charter flights to destinations in the United States, Mexico, Costa Rica and the Caribbean (including Cuba from 2015) as well as ad-hoc charters.

Kosova Airlines: Kosova Airlines is an airline that is based in Kosovo .  The airline links Pristina to major European cities.  The airline was established in autumn 2003 by the United Nations Interim Administration Mission in Kosovo (UNMIK) and the Kosovo Government.  On 10 May 2006, the only aircraft in the Kosova Airlines fleet, a Boeing 737-700, which was wet leased from the German airline Hamburg International, was returned to that airline, and Kosova Airlines ceased operating flights.  The airline however continues to work with other airline companies flying into Pristina, such as Germanwings, LTU, Air Berlin and a few others.

SpiceJet: SpiceJet is a low-cost airline headquartered in Gurugram, India.  It is the third largest airline in the country by number of domestic passengers carried, with a market share of 14.2% as of July 2017.  The airline operates 312 daily flights to 55 destinations, including 45 Indian and 10 international destinations from its hubs at Delhi, Kolkata and Hyderabad.

Supporting paragraphs: Germanwings destinations Eurowings
Answer: Düsseldorf