During the early 1970s, the newspaper strongly opposed Salvador Allende's government and supported the September 11 military coup in 1973, as well as General Augusto Pinochet's subsequent dictatorship.

In November 2008, the newspaper revamped its website, integrating all Copesa media into a single page called Mediacenter La Tercera.

On August 1, 2010, La Tercera introduced a new header with red and white lettering, designed by Marcelo Godoy from Chile and Javier Errea from Spain.

Starting from November 2, 2010, subscribers were able to access the International Edition of the Spanish newspaper El País upon payment of an additional fee.

On July 16, 2017, the newspaper relocated its offices from the historical site at Vicuña Mackenna 1962 (Ñuñoa) to a new building at Apoquindo 4660 (Las Condes).