The new subway in Sofia will connect the central railway station to the Sofia International Airport and a part of the subway will pass through the centre of the Bulgarian capital.

The proposals for the project will be presented to the Bulgarian Finance and Transport Ministries in August. Changes were introduced based on recommendations from the Transport Ministry, so that the project could apply for EU funding.

The subway will connect all major transportation in the capital and construction should begin in 2008 at a cost of €233m. The project will take no more than four years to complete, according to initial analysis.
Underground stations close to the airport will enable passengers to enter the airport directly for passport control. According to the plan, each underground station is expected to have its own parking lot