Line F is a planned addition to the Buenos Aires Underground.

In 2019, the government of Buenos Aires was looking for a group to create a plan of the line,[1][2] but this study was cancelled in 2022.

[3] The city decided to create a study with their own staff, which is still underway as of 2024.

The estimated cost of the project has risen from 800 million dollars,[4] to 2 billion USD.

The line is set to be the most modern in the network, using automatic trains, a communications-based train control system like the one being installed on Line C, and platform screen doors.