Buenos Aires City Mayor Jorge Macri announced that the city will open tender bids this year to add a new subway line. The F line, set to become the 7th subway operating in the city, is expected to begin construction in 2026 and be operational by 2031. 

In a press conference he gave Friday morning, Macri said that the F line would allow the addition of over 300,000 new users. “Over 800,000 people currently use our subway system, so this means a 40% increase,” he said, calling the initiative a “historic step” and “the largest urban infrastructure project in the country.”

Part of an original plan to add three new subway lines the city legislature passed in 2001, the tender for the F line had already been launched in 2019 by former Mayor Horacio Rodriguez Larreta. The last new subway line in Buenos Aires was the H line, which began construction in 2001 and started operations in 2007. 

According to Macri, the new line will help decongest the passenger flow coming into the city from the southern Greater Buenos Aires area. Currently, the only subway serving these users is the C line, which runs between the Constitution and the Retiro train stations. This will change with the addition of the F line, set to have one of its end stations in Barracas, just a few blocks away from the iconic Boca Juniors stadium of La Bombonera.  

The plan projects the subway will be 9 kilometers long and have 14 trains running through Constitución, San Cristóbal, Monserrat, San Nicolás, and Recoleta, finally ending in Palermo, located in northern Buenos Aires City. It will have 11 stations in total and provide connections to all other 6 subway lines as well as the General Roca Railway, which travels south from Constitution station into Greater Buenos Aires and the rest of the province. 

Total investment is expected to be close to US$1.8 billion. 

Construction will be conducted in two stages. The first phase is scheduled to begin next year and will include 5 kilometers built between Barracas and the Callao station of the D line in Balvanera. This initial tract will have six stations and provide connections to all subway lines except the H line. 

A second stage will extend the F line all the way to the Plaza Italia station of the D line in Palermo and include a connection to the H line. 

According to a press release sent out by the city government, in the next 60 days the Infrastructure Ministry will publish all relevant information and required conditions for companies interested in offering a tender. The bid will be launched in June with the goal of kicking off construction next year.