High Quality Content by WIKIPEDIA articles! Sofia Airport (IATA: SOF, ICAO: LBSF) (Bulgarian: Летище София, Letishte Sofiya), sometimes also called Letishte Sofia-Vrazhdebna (Bulgarian: Летище София-Враждебна, Letishte Sofiya-Vrazhdebna), is the main airport in Sofia, Bulgaria. Located 5 km (3.1 mi) east of central Sofia. In 2010 the number of passengers was 3.3 million. Sofia airport also includes Vrazhdebna Air Base of the Bulgarian Air Force.