Sofia Airport is the main airport in Sofia and Bulgaria. Located 5 km (3.1 mi) east of central Sofia. In 2010 the number of passengers served on the airport was 3.3 million. It was recently renovated and there are plans for further expansion. Nowadays, the airport has a modern European look.

The airport was initially built in the late 1930s. The passenger terminal (now Terminal 1) on the south side of the airport was completed during the Second World War in the manner of a then-modern European railway terminus to designs by the architect Ivan Marangozov. It opened after several years of delay in 1947. Design and construction of a new control tower was mooted in 2006 but this project appeared to be in abeyance by 2008. According to the plan, a new Sofia Airport terminal was built to the east of the old terminal, and a second runway was constructed alongside the existing one. The old runway has been turned into a taxiway parallel to the newly constructed runway. Both cross the Iskar river. The new runway was opened in August 2006, while the new terminal opened in December 2006.

Two bus routes (No 84 and 384) connect the airport. Line 84 goes to the Sofia University and Line 384 to the Mladost 1 Metro Station (working hours 5 a.m. - 23 p.m every 20-30 minutes). A small shuttle bus (No 30) connects the first terminal with the city centre and Sofia's biggest residential area of Lyulin. Taxis are available at the landside of the arrivals areas of Terminals 1 and 2. OK Supertrans is the official taxi provider to Sofia airport. Taxi cost 5 - 7 Euro (10 to 15 leva) to the city centre. Fraudsters, posing as a taxi driver in the lobby often require 50 or more € for a ride into town. The official price must be showed on the window of each cab.