Dortmund Airport(IATA: DTM), is located 10 km (6.2 mi) east of Dortmund, Germany. Its slogan is Näher als man denkt (Closer than you think). Since 2006 it has been carrying the name "Dortmund Airport 21", in reference to the fact that Dortmund's utility company, DSW21, is its major shareholder. Dortmund Airport has a maximum capacity of around 2.5 million pax and served approximately 2.3 million passengers in 2008.
Here are some of the major Airlines that service Dortmund Airport:
Bulgarian Air Charter
The above mentioned information is taken from http://en.wikipedia.org/wiki/Dortmund_Airport