Sofia Airport Launches €230 Million Tender for New Terminal

Key Takeaways

• SOF Connect launched a €230 million tender for Sofia Airport Terminal 3 on June 30, 2025.
• Terminal 3 will increase passenger capacity from 7 million to 20 million by April 2031.
• Letter of Interest deadline is October 15, 2025, with construction starting after April 2026.

On June 30, 2025, SOF Connect, the operator and concession-holder of Sofia Airport, launched a major tender for the design and construction of the long-awaited Terminal 3. This €230 million tender marks the start of Bulgaria’s largest public infrastructure project in the next five years. The new terminal, along with upgrades to existing facilities, is set to transform Sofia Airport into a leading air hub in the Balkans by 2031. Here’s a detailed look at what this means for travelers, airlines, businesses, and the broader Bulgarian economy.

What’s Happening at Sofia Airport?

SOF Connect, which has managed Sofia Airport since winning a 35-year concession in 2021, is inviting companies to submit their interest in building Terminal 3. The tender covers not only the new terminal but also the modernization of Terminal 2 and the creation of new transport and commercial areas. The total investment for construction is about BGN 450 million (roughly €230 million), with an extra BGN 50 million set aside for equipment, bringing the total to BGN 500 million (about €255 million).

Key Dates and How the Tender Works

• Tender Launch: June 30, 2025
• Letter of Interest Deadline: October 15, 2025 (some sources mention October 1, 2025, for initial submissions)
• Next Steps: After reviewing all letters of interest, SOF Connect will announce the formal award procedure on the official Sofia Airport procurement portal.
• Construction Permit Target: April 2026
• Terminal 3 Opening: Scheduled for April 2031

What’s Included in the Sofia Airport Terminal 3 Tender?

The tender is broad and ambitious. Here’s what’s on the table:

• Terminal 3 Construction: A brand-new, 60,000 square meter terminal directly connected to the existing Terminal 2. This will include new arrivals and departures halls, a centralized security checkpoint, offices, and a new boarding pier.
• Terminal 2 Modernization: Expansion of commercial and retail areas, conversion of some passenger processing spaces into offices, and upgrades to fire and ICT (information and communication technology) systems.
• Transport and Access: A new curbside area and transportation center to improve passenger flow and access.
• Operational Continuity: All work will be carefully phased so that airport operations and passenger safety are never compromised. Existing parking, access roads, and passenger circulation areas will remain open during construction.

Why Is This Project So Important?

The Sofia Airport Terminal 3 tender is not just about new buildings. It’s about preparing Bulgaria for the future. The airport’s annual passenger capacity will jump from 7 million to 20 million once the upgrades are complete. This is a huge leap that will help Sofia compete with other major airports in the region.

Economic and Social Impact

SOF Connect’s CEO, Jesús Caballero, called this “the largest public infrastructure development project to be implemented in the country over the next five years.” He added, “In 2031, Bulgaria will have an airport that meets the highest global standards.” The Bulgarian government is fully behind the project, even postponing concession fee payments for 20 years to allow SOF Connect to focus on investment.

The economic benefits are already being felt. SOF Connect claims its investments have boosted Bulgaria’s GDP by 1.5% and helped reduce poverty by more than 15% in the first three years of the concession. These numbers show that the airport’s growth is tied closely to the country’s overall progress.

Who Benefits from the Sofia Airport Terminal 3 Tender?

• Travelers: Passengers will enjoy a modern, spacious, and efficient airport experience. The new terminal will offer more shops, restaurants, and comfortable waiting areas. Security checks will be faster and more centralized.
• Airlines: The design focuses on efficiency and quick turnarounds, especially for low-cost carriers (LCCs), which now make up about 70% of Sofia’s traffic. This means more flights and better schedules.
• Businesses: The construction sector will see major opportunities, as the project requires expertise in large-scale infrastructure. Retailers and service providers will also benefit from expanded commercial areas.
• Government: The project supports Bulgaria’s goal of becoming a regional leader in air travel and boosts the national economy.
• Airport Operator (SOF Connect): The company cements its role as a key player in Bulgaria’s infrastructure and economic development.

Step-by-Step: How the Tender Process Works

1. Expression of Interest: Companies submit a Letter of Interest by October 15, 2025.
2. Review and Shortlisting: SOF Connect reviews all submissions and selects a shortlist of qualified candidates.
3. Official Tender Launch: The formal award procedure is announced on the Sofia Airport procurement website.
4. Submission of Bids: Shortlisted companies submit detailed technical and financial proposals.
5. Evaluation and Award: Bids are judged on expertise, experience, and how well they meet the project’s needs.
6. Contract Signing and Mobilization: The winning bidder signs the contract, and construction begins. All work is phased to keep the airport running smoothly.

Background: How Did We Get Here?

Sofia Airport has been Bulgaria’s main international gateway for decades. In 2021, SOF Connect took over management with a 35-year concession, promising to modernize and expand the airport. By the end of 2025, SOF Connect had already invested over BGN 150 million in upgrades and sustainability projects.

The Terminal 3 project is the centerpiece of a larger vision to make Sofia Airport the first five-star regional airport in Europe. This means not just bigger buildings, but better passenger experiences, more efficient operations, and a strong focus on green energy.

Sustainability and the Future

A key part of the modernization plan is sustainability. SOF Connect plans to build a 20-megawatt solar park to power the airport and is committed to green operations. This focus on the environment is in line with global trends and will help Sofia Airport stand out as a leader in the region.

What Happens to the Old Terminals?

Once Terminal 3 is open and Terminal 2 is fully modernized, Terminal 1 will be repurposed for business and VIP travelers. This ensures that all parts of the airport are used efficiently and that different types of passengers get the services they need.

Cargo Expansion: Another Tender on the Horizon

While the focus is on passenger terminals, SOF Connect is also working to double the airport’s cargo capacity. A separate tender for this expansion is expected to be awarded by mid-2025. This will help Sofia Airport handle more goods and support Bulgaria’s growing trade links.

How Does This Affect Immigration and Border Control?

With the expansion, Sofia Airport will be able to process many more travelers each year. This means immigration and border control facilities will also be upgraded. The new centralized security checkpoint in Terminal 3 will speed up checks and improve safety. For travelers, this means shorter lines and a smoother arrival or departure experience.

Official Information and How to Stay Updated

All official tender documents, updates, and announcements are published on the Sofia Airport procurement portal. This is the best place for companies interested in the tender to find accurate and up-to-date information.

Multiple Perspectives: What Do Stakeholders Say?

• SOF Connect: Sees the project as a chance to transform Bulgaria’s aviation sector and set new standards for the region.
• Bulgarian Government: Supports the project with financial flexibility and regulatory help, seeing it as a driver of economic growth.
• Airlines: Especially low-cost carriers, welcome the expansion for its efficiency and competitive airport charges.
• Passengers: Look forward to better facilities, more flight options, and a smoother travel experience.
• Construction Sector: Sees a major opportunity for jobs and business in one of Bulgaria’s largest infrastructure projects.

Looking Ahead: What’s Next for Sofia Airport?

• Terminal 3 Operational by 2031: The project is on track for completion and opening in April 2031. When finished, Sofia Airport will have the highest passenger capacity in the Balkans.
• Long-Term Investment: SOF Connect plans to invest more than BGN 1.2 billion in Sofia Airport through 2055, ensuring ongoing improvements and modernization.
• Green Initiatives: The airport’s focus on sustainability will continue, with more green energy projects and eco-friendly operations.

Why Should Travelers and Businesses Care?

For travelers, the new Terminal 3 means a better airport experience—less waiting, more comfort, and more choices. For airlines, it means more efficient operations and the ability to add new routes. For businesses, especially those in construction, retail, and services, the project brings new opportunities and growth.

How to Participate in the Sofia Airport Terminal 3 Tender

If your company is interested in taking part in this major project, the first step is to submit a Letter of Interest by the deadline (October 15, 2025). After that, keep an eye on the official procurement portal for updates on the award procedure and further requirements.

Practical Tips for Interested Companies

• Read All Documents Carefully: Make sure you understand the requirements and deadlines.
• Prepare a Strong Submission: Highlight your experience with large infrastructure projects and your ability to work while the airport remains open.
• Stay Informed: Check the official portal regularly for updates and new information.
• Plan for Sustainability: Show how your company can help meet the airport’s green goals.

What Does This Mean for Bulgaria’s Place in Europe?

With the Sofia Airport Terminal 3 tender, Bulgaria is making a statement. The country is investing in its future, aiming to become a key player in European air travel. The project will help attract more airlines, boost tourism, and support the economy.

Summary and Takeaways

• Sofia Airport Terminal 3 tender is now open, with a €230 million budget for design and construction.
• The project will expand capacity from 7 million to 20 million passengers per year.
• Deadline for Letters of Interest: October 15, 2025.
• Construction is set to begin after April 2026, with Terminal 3 opening by April 2031.
• The project includes modernization of Terminal 2 and new transport and commercial areas.
• All work will be phased to keep the airport running safely and smoothly.
• The Bulgarian government and SOF Connect are fully committed, with strong support for sustainability and economic growth.
• For official updates and tender documents, visit the Sofia Airport procurement portal.

As reported by VisaVerge.com, the Sofia Airport Terminal 3 tender is a major step forward for Bulgaria’s aviation sector. The project promises to bring new opportunities for travelers, airlines, and businesses, while supporting the country’s economic and social development. With careful planning and strong support from all stakeholders, Sofia Airport is set to become a leading regional hub by 2031.

For more information on Bulgaria’s infrastructure and immigration policies, you can visit the official Bulgarian government portal. This site offers updates on public projects, travel requirements, and other important topics for residents and visitors alike.

In conclusion, the Sofia Airport Terminal 3 tender is more than just a construction project—it’s a symbol of Bulgaria’s ambitions and a practical step toward a brighter, more connected future. Whether you’re a traveler, a business, or a potential bidder, this is a development worth watching closely.

Learn Today

Tender → A public invitation for companies to submit proposals for construction or services.
Concession → A long-term agreement allowing a company to operate and manage public infrastructure.
Terminal → An airport building where passengers arrive, depart, and connect between flights.
Centralized Security Checkpoint → A single, shared area for passenger security screening improving efficiency and safety.
Capacity → The maximum number of passengers an airport can handle annually.

This Article in a Nutshell

Sofia Airport begins a €230 million project to build Terminal 3, boosting capacity to 20 million passengers by 2031. The tender includes Terminal 2 modernization and new transport zones, supporting Bulgaria’s economic growth and sustainability goals while enhancing traveler and airline experiences.
— By VisaVerge.com