Andoni López was born in Barakaldo, a Basque city where the vast majority of citizens are fans of Athletic Club. He joined Lezama in 2006 when he was just 10 years old, but left in 2010 to sign with local academy Danok Bat. After two years he returned to Lezama in 2012 and has been making waves ever since. López was promoted to Bilbao Athletic in 2016 and went on to play an integral role in the team, featuring in over 60 matches. He made his first team debut on 4 February, 2018 in a match against Girona and is viewed as a very promising player. The left-back was then called up to spend preseason training with the senior squad before leaving on loan with Almeria for the 2018/2019 season.
Andoni López is under contract through 2021 with an unknown release clause and will be spending the 2019/2020 on loan with Elche.