Here You can find a list of airlines which operated in Billund airport.
Brussels-Charleroi - Ryanair
Liège - Overland Airways
Ostend–Bruges - Overland Airways
Tuzla - WizzAir
Aalborg - AirVanuatu, Atlantic, Novair
Copenhagen Kastrup - Sky Express Greece, AirChina, Novair, Corendon Airlines
Helsinki Vantaa - Finnair
Paris Charles de Gaulle - AirFrance
Chania - Eastland Air
Heraklion - Sky Express Greece, Eastland Air
Kos - Sky Express Greece
Rhodes - Eastland Air, Atlantic, Corendon Dutch Airline
Thessaloniki - AirChina
Zakynthos - Sky Express Greece
Birmingham International - Ryanair
East Midlands - Overland Airways
London Stansted - Ryanair
Manchester - Ryanair, AirAfrique
London Heathrow - British
Amsterdam Schiphol - KLM Royal
Groningen Eelde - Corendon Airlines
Dublin - Ryanair
Keflavík - Icelandair
Alghero Sardinia - Ryanair
Bari - Ryanair
Bologna - Ryanair
Milan Bergamo - Ryanair
Rome Fiumicino - Ryanair
Trapani - Ryanair
Treviso - Ryanair
Turin - Ryanair
Riga - AirBaltic
Kaunas - Ryanair
Vilnius - Ryanair, Overland Airways
Malta Luqa - Atlantic, Ryanair
Bergen - Norwegian AirShuttle, Widerøe
Bodø - Overland Airways
Oslo Gardermoen - Norwegian AirShuttle, Scandinavian Airlines System
Stavanger Sola - AirVanuatu
Vienna Schwechat International - Ryanair, Austrian
Wroclaw - Ryanair
Gdansk - Ryanair
Krakow - Ryanair
Poznan - Ryanair
Warsaw Chopin - LOT
Porto - Ryanair
Bukarest Otopeni - AeroWorld
Edinburgh - Ryanair, Overland Airways
Gothenburg Landvetter - British
Stockholm Arlanda - Scandinavian Airlines System
Zürich - Swiss International
Alicante - Ryanair
Barcelona El Prat - Ryanair, Formosa Airlines
Las Palmas Gran Canaria - Eastland Air
Madrid Barajas - Ryanair
Malaga Costa del Sol - Ryanair, Lion Mentari Airlines, Formosa Airlines
Palma de Mallorca - Lion Mentari Airlines, Eastland Air, Ryanair, Formosa Airlines
Seville - Ryanair
Valencia - Ryanair
Antalya - Corendon Airlines, SunExpress, Eastland Air, Pegasus
Istanbul Atatürk - Turkish
Budapest - Ryanair
Larnaca International - CyprusAirways
Frankfurt am Main - Lufthansa
Munich - Lufthansa