In 2011–12 it played the Chilean Primera División B, finishing in 2nd place with 66 points. It won a place to play the two-legged Promotion Final against the third-placed Ñublense. After both the first leg (1–1) and second leg (2–2) finished in draws, the play-off went to penalties, where Barnechea lost 7–6.
In the season 2013–14, A.C. Barnechea finished in 4th place with 59 points and won a place in the Play-off for the Second Promotion to the First Division. They defeated Santiago Morning in the semi-finals, winning 2–1 over two legs. In the finals against San Luis, Barnechea won the first leg 1–0 but lost the return fixture by the same score. Their captain and goalkeeper Jorge Manduca scored the decisive penalty in the resulting shoot-out to send Barnechea through to the Chilean Primera División 2014–15 by a 4–3 margin.
On August 3, 2014, Nicolas Maturana scored Barnechea's first-ever goal in the top flight against Audax Italiano. A week later, Barnechea won their first match in the First Division, with Francisco Ibañez scoring the only goal in a 1–0 win against San Marcos de Arica.
The club are currently[when?] 9th in the Torneo Apertura 2014 with 20 points from 15 matches.