Ioniță moved to Astra Giurgiu during the winter transfer window of 2014,[3] with fellow Liga I sides Dinamo București and Petrolul Ploiești also interested in signing him.

[8] Ioniță was named the Liga I Player of the Month for November 2017 after scoring in three consecutive league matches,[9] against Universitatea Craiova,[10] Concordia Chiajna[11] and FCSB, respectively.

[12] Amid rumours of a transfer to CFR Cluj in early January 2018, Ioniță refused to renew his contract with Astra and was expelled from the first team for an undetermined period.

[17] Later that month, he recorded his first goal for CFR in a 2–0 away success over Juventus București, after netting in the rebound from his penalty that had been saved by his former Rapid teammate Virgil Drăghia.

[20] In September 2020, the Romanian Anti-Doping Agency handed Ioniță along with two of his Astra teammates a one-year playing ban after they each received intravenous injections of more than 100mL of vitamins within 24 hours.

[24] Ioniță scored his first goal upon return on 11 February 2022, equalising late in a 1–1 league draw with Sepsi OSK as his team played 40 minutes with one player less.