On 2 April 2015, Sofia metro undreground extension to the airport opened. The length of the section is 5 km and 4 stations, travelling time from the airport to the centre of the city is to take to about 15 minutes. The 4 stations are Druzhba, Iskursko Chausse, Sofia Sveta Gora and Sofia Airport, and one of the stations, Iskursko Chausse, has a direct connection to the rail line between Sofia and Plovdiv. Now the underground in Sofia has a total of 36 km of lines and 31 stations.
The construction of the new 5 km strech of the metro from Tsarigradsko Chausse Boulevard to the airport began in late November 2012 and was implemented under OPT 2007-2013.
“We continue to expand the underground network under Operational Program “Transport and Transport Infrastructure” 2014 – 2020. Financing of the most difficult section along the line from Yanko Sakazov Blvd. to Krasno Selo residential area has already been planned. The section will provide the connection with two other lines and will service several busy areas of the city. The value of the project is 800 million levs (EUR 409 million) and includes 7.2 km of new lines and 7 stations, as well as the construction of a depot in Krasno Selo and the purchase of 20 trains.
The project for the expansion of the underground – Lot 3 has a total value of 407 million levs (EUR 208 million) and some 215 millions levs (EUR 110 million) of them have been provided under OPT 2007-2013. The project is divided into two Lots – Lot 1 that encompass the line from Tsarigradsko Shose Blvd. to Sofia Airport, and Lot 2 that encompasses the expansion to the Business Park in Mladost 3 residential area. The grant amounts to 135 million levs (EUR 69 million) and is provided under OPT 2007-2013 for the completion of Lot 1.