Athens is moving ahead with one of its most ambitious public transport upgrades, as the capital city of Greece prioritizes metro expansion toward the southern coast in direct connection with the large-scale redevelopment of Ellinikon, the former international airport. The goal is clear: integrate new urban districts, ease congestion, and make the capital more accessible for residents, visitors, and investors alike.
Construction on the new metro line is progressing steadily, with tunneling advancing beneath densely populated areas and key activity zones. Government officials have confirmed that among all planned extensions, the southern coastal route is at the top of the agenda, designed to link the metro network directly with the emerging waterfront development. This extension is expected to introduce a rare feature for Athens: two branches operating on the same metro line, improving flexibility and coverage across the south.
Progress underground for Athens metro
Two tunnel boring machines are currently carving out the core of the new line from opposite directions. Together, they have already completed several miles of tunnels, passing beneath future station sites to save time and reduce surface disruption. Full completion of the central section is targeted before the end of the decade, barring unforeseen technical challenges.
While construction continues, archaeological surveys and infrastructure adjustments are being carefully managed. Despite these challenges, station construction is well underway across multiple neighborhoods, reinforcing confidence in the project’s timeline.
Expanding westward and modernizing the Athens metro network
At the same time, work is advancing on a separate metro extension serving western districts of the metropolitan area. This project includes new stations, upgraded rail facilities, and major modernization of signaling and control systems across existing lines. The upgrades are essential to support future expansions without interrupting daily service.
Once operational, the western extension is expected to serve tens of thousands of passengers daily, connecting residential zones with employment centers and easing pressure on road traffic. New park-and-ride and bus transfer facilities are also planned, strengthening multimodal transport options for commuters.
Why this matters beyond Greece
For international audiences, these projects signal a broader transformation. Athens is positioning itself as a more connected, livable, and investment-ready European capital. Improved metro access supports tourism year-round, enhances real estate value in emerging districts, and strengthens links between business hubs, cultural sites, and coastal destinations.
Future branches and long-term vision
The new metro line is only the beginning. Plans already envision extensions toward northern business districts, major sports and exhibition venues, and national transport corridors. Additional branches are being studied to serve growing suburbs and connect cultural landmarks with the existing network.
On the southern side, the coastal extension remains a strategic priority. The proposed design includes two separate branches, one serving hillside residential areas and another feeding directly into the coastal redevelopment zone. If accomplished, this will mark the first time Athens operates dual branches on a single metro line, a move aligned with metro systems in larger global cities.
What next?
Several projects are now moving through planning and funding stages. The most advanced include further western expansion, the coastal extension tied to the waterfront redevelopment, and the northern arc connecting major employment centers. Together, these projects aim to push the Athens metro network beyond 100 stations for the first time.
As Athens reinvents itself, the metro is becoming more than a transport system. It is a backbone for sustainable growth, a catalyst for investment, and a key reason why the city is becoming increasingly attractive to international travelers, remote workers, and long-term investors looking at the Mediterranean’s next urban success story.
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