Onni Johannes Simonpoika Valakari (born 18 August 1999) is a Finnish professional footballer who plays as an attacking midfielder for Major League Soccer club San Diego FC, on loan from Pafos, and the Finland national team.

After making his senior debut with the club's reserve team SJK II in a then third-tier level Kakkonen in 2015, Valakari continued his career with Turun Palloseura (TPS).

[10] On 26 August 2024, Valakari was loaned out to Swedish Allsvenskan club AIK for the rest of the 2024 season,[11] with a purchase option of around €1 million.

[25][26][27] In May 2024, it was reported that Valakari had been sentenced to a €9,900 fine in Finnish Court of Kymenlaakso for not enrolling to the mandatory conscription service on time in January 2022.

[28] In November 2024, in an interview to Helsingin Sanomat, Valakari sparked controversy with his positive comments on Andrew Tate and Donald Trump, implying also that the media has painted a false picture of them.