Question: What is this Danish charter airline headquartered in Copenhagen which resulted from merging of two airlines and operates at Copenhagen Kastrup Airport?

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Conair of Scandinavia: Conair of Scandinavia A/S was a Danish charter airline which operated between 1965 and 1993.  Established by Simon Spies, it originally had a fleet of Douglas DC-7 aircraft, taken over from Flying Enterprise.  From about 1970, the airline replaced its fleet with Boeing 720 aircraft, bought from Eastern.  From around 1979 these were replaced by the engine stronger version Boeing 720B.  It bought second-hand Airbus A300 in 1987 and in 1991 six new Airbus A320.  The airline was based at Copenhagen Airport.  In 1993, it merged with Scanair to establish Premiair, today Thomas Cook Airlines Scandinavia which still has its base at Copenhagen Kastrup Airport, EKCH/CPH.

Roskilde Airport: Roskilde Airport (IATA: RKE, ICAO: EKRK) , officially known as Copenhagen Airport, Roskilde (Danish: "Københavns Lufthavn, Roskilde" ), is located 4 nautical miles (7 km) southeast of Roskilde near the town Tune.  It was opened in 1973 as the first of three planned relief airports around Copenhagen.  These plans were shelved shortly after, and the two other relief airports never made it past the planning stage.  The airport is owned and operated by Københavns Lufthavne A/S (Copenhagen Airports) which also operates Copenhagen's major airport at Kastrup.  The airport had 25,053 passengers in 2003.

Canada 3000: Canada 3000 Inc. was a Canadian discount charter airline offering domestic and international flights.  It was the largest charter airline in the world at the time of its operation, with over 90 destinations worldwide, although it changed to scheduled service in 2000 after the Canadian Airlines and Air Canada merger.  Canada 3000 competed with Air Canada, WestJet, and fellow charter airline Air Transat.  In November 2001, the airline went out of business after a sharp decline in revenues following the September 11, 2001, terrorist attacks in the United States.  There have been several attempts to restart the airline since then.  The airline was headquartered in Etobicoke in the west-end of Toronto, Ontario.

History of Braathens SAFE (1946–93): Braathens South American & Far East Airtransport A/S or Braathens SAFE was founded by ship-owner Ludvig G. Braathen in 1946.  It started as a charter airline based at Oslo Airport, Gardermoen in Norway, flying to destinations in the Far East and in South America.  At first the airline used Douglas DC-4s, and later also Douglas DC-3s.  In 1948, the airline moved to Oslo Airport, Fornebu and started regular scheduled flights to the Far East.  In 1952, the airline started cooperation with the Icelandic airline Loftleidir, where until 1960 the two airlines in cooperation flew flights to Reykjavík.  Domestic services started in 1951, using de Havilland Herons on a route from Oslo to Stavanger via Tønsberg.  Braathens SAFE also established at Stavanger Airport, Sola.  A second route was started two years later to Trondheim.  The Heron routes also stopped in Farsund, Kristiansand, Notodden to Stavanger and Hamar, Røros to Trondheim.

Jet Time: Jet Time A/S is a Danish scheduled and charter airline with its head office in Kastrup, Tårnby Municipality, and its main base at Copenhagen Airport.

Kastrup: Kastrup is a suburb of Copenhagen, Denmark, situated on the east coast of Amager in Tårnby Municipality.  It is best known as the site of Copenhagen Airport.  In Danish, the airport is often called "Kastrup Lufthavn" (Kastrup Airport) or "Københavns Lufthavn, Kastrup" (Copenhagen Airport, Kastrup).  The population of Kastrup is approximately 43 000.

Copenhagen Airport: Copenhagen Airport, Kastrup (Danish: "Københavns Lufthavn, Kastrup" ) (IATA: CPH, ICAO: EKCH ) is the main international airport serving Copenhagen, Denmark, the entire Zealand, the Øresund Region, and a large part of southern Sweden (not only Scania).  It is the largest airport in the Nordic countries with 29 million passengers in 2016 and one of the oldest international airports in Europe.  It is the third-busiest airport in Northern Europe, and by far the busiest for international travel in Scandinavia.

Copenhagen Airport, Kastrup Station: Copenhagen Airport, Kastrup Station (Danish: "Københavns Lufthavn, Kastrup Station" ) is a railway station in Tårnby, Denmark, served by DSB’s regional trains including the Oresundtrain network.  The nearby Lufthavnen metro station is served by the Copenhagen Metro’s line M2.  The reconstructed railway station opened on 28 September 2007, and Metro service began the following month.  The stations take their names from Copenhagen Airport, to which they are connected.  It is linked to Ørestad station on the M1 line by DSB regional trains.  It is located in fare zone 4.

Air Alsie: Air Alsie is a Danish charter airline headquartered in Sønderborg and based at Sønderborg Airport, which operates business jet services.

Thomas Cook Airlines Scandinavia: Thomas Cook Airlines Scandinavia is a Danish charter airline headquartered in Copenhagen and part of the Thomas Cook Group.  It operates flights to leisure destinations mainly in the Mediterranean as well as some long-haul service from several bases in the Nordic Countries.

Supporting paragraphs: Conair of Scandinavia Thomas Cook Airlines Scandinavia
Answer: Thomas Cook Airlines Scandinavia