SOF Connect, the concessionaire responsible for the management and development of Sofia International Airport, has officially launched a tender procedure for the design and construction of Terminal 3, the modernization of Terminal 2, and the development of a new transportation hub.
This major infrastructure project, with a total estimated investment of BGN 450 million, aims to significantly expand and modernize the airport’s facilities, preparing it to meet the growing demand for air travel and bringing it in line with global aviation standards.
In addition to the core investment of BGN 450 million, SOF Connect plans to allocate a further BGN 50 million to procure and equip the terminals with cutting-edge technology and systems, ensuring that both the operational capacity and passenger experience are optimized. This ambitious project, which is set to be completed by 2031, is expected to enhance Sofia Airport’s status as a key regional aviation hub, playing an important role in Bulgaria’s tourism and business sectors for years to come.
The scope of the project includes several key components that will enhance the capacity and operational efficiency of Sofia Airport:
One of the main elements of the development is the creation of Terminal 3, a state-of-the-art passenger terminal with an area of 60,000 square meters. Terminal 3 will be connected to the existing Terminal 2, enabling the seamless integration of the two terminals. This new terminal will dramatically increase the airport’s annual passenger capacity from 7 million passengers to an estimated 20 million passengers. This will be achieved by introducing new and expanded facilities, including:
In addition to the development of Terminal 3, SOF Connect will also modernize Terminal 2, Bulgaria’s current primary terminal. The renovation will involve upgrading the 72,000 square meter terminal with a focus on improving passenger experience and operational efficiency. Key aspects of this modernization include:
The new transportation center will be another vital component of the project, covering an area of 9,000 square meters. This transportation hub will be equipped with 21 coach parking slots and well-designed access roads, facilitating smooth connections between the airport and other parts of Sofia and beyond. This will include:
As part of its commitment to sustainability, SOF Connect has prioritized green building certification for Terminal 3, aiming for a BREEAM rating. This certification will ensure that the new terminal is designed with the latest environmental standards in mind, focusing on energy efficiency, waste reduction, and the use of sustainable building materials. The new terminal will incorporate digital, accessible, and sensory-driven solutions, which are essential to improving the overall passenger experience while adhering to Skytrax 5-star regional airport standards.
The implementation of these international standards will set the airport apart as a regional leader in sustainability and innovation, improving Bulgaria’s image as a destination committed to responsible development and tourism.
The construction process will take place around the existing fully operational Terminal 2, which means that the project will be executed in multiple phases to ensure that the airport continues to operate safely and efficiently throughout the development period. The phased approach will be designed to:
Additionally, key landside infrastructure, such as parking facilities, access roads, and passenger circulation areas, will remain operational throughout the construction process. The goal is to minimize any potential inconvenience to travelers while delivering the ambitious expansion project on time and within budget.
SOF Connect has officially invited companies to express their interest in participating in the project by submitting a Letter of Interest by October 15, 2025. The company is looking for entities with proven expertise in delivering large-scale infrastructure projects, particularly those with experience in designing and constructing airport terminals. Following the submission deadline, SOF Connect will initiate the official awarding process through a public notice.
The project is expected to attract a significant number of international and local contractors, who will be able to showcase their capabilities and contribute to the creation of a world-class airport. This will ensure that Bulgaria has a leading airport that meets the needs of passengers, the aviation industry, and the country’s tourism sector for years to come.
This expansion project represents a major investment in Bulgaria’s future, with long-term benefits for the national economy, tourism, and infrastructure development. With a projected completion date of 2031, Terminal 3 and the modernization of Terminal 2 will play a key role in Bulgaria’s ambitions to become a key aviation hub in Eastern Europe, helping to strengthen its position on the global stage.
As the project progresses, SOF Connect remains committed to delivering a modern, sustainable, and efficient airport, one that will significantly enhance the passenger experience, increase operational capacity, and contribute to the overall economic growth of Bulgaria.
Image: sofia-airport
