The first stage was between Avenida de América and , opening on 1 April 1998, followed by Gregorio Marañón to . The next section to open extended the line to , and a final section further reached . Pitis, however, was the only station on the Madrid metro to have restricted opening times.
The initial part of the metro line connected Avenida de América and , opening on 1 April 1998, and was subsequently extended to Gregorio Marañón, then to , and ultimately to . Pitis stood out as the sole station with limited service hours.