SOFIA is the latest former communist capital, to attract the interest of the budget airlines. Wizz Air, only itself launched in May 2004, is to introduce a three times per week flight from Bulgaria ” Budapest on 18 September, the service connecting with both the Frankfurt and London operations. Bulgaria is expected to join the European Union in 2007. Sofia is served from London by British Airways, from both Gatwick and Heathrow and Bulgaria Air from Gatwick.
http://www.wizzair.com