Hertha Dárdai is a youth product of
Hertha BSC, and started training with their senior side in 2023 on a support contract until 2024. He made his senior and professional debut with Hertha BSC as a late substitute in a 1–0
2. Bundesliga loss to
Fortuna Düsseldorf on 29 July 2023. He made his debut alongside his 2 brothers, and was coached by his father.
Wolfsburg On 4 June 2024, Dárdai signed a long-term contract with
VfL Wolfsburg. On 31 August 2024, he played his first Bundesliga match in a 2-1 victory over
Holstein Kiel on the second game week of the
2024–25 Bundesliga season. Dárdai entered the pitch as a substitute for
Tiago Tomás in the 80th minute. On 2 November 2024, he was included in the starting lineup and was not substituted in a 1-1 draw against
FC Augsburg in the
2024–25 Bundesliga season. He suffered a
cruciate ligament rupture; therefore, he had to rest for months. On 2 April 2026, he could start training with balls on a turf after months of convalescnece. ==International career==