In July in Gdynia, at the Poland Open, she reached her first WTA Tour-level quarterfinal also recording her first two wins on the tour.

[3] In early November, she won her first title at a WTA 125 event, defeating Diane Parry in the final of the Argentina Open.

[6] At the French Open, she reached the first Grand Slam quarterfinal in her career, in the doubles event, partnering Greet Minnen.

[10] She won her maiden WTA Tour title in doubles at the Palermo Ladies Open, partnering with Kimberley Zimmermann.

[14] Partnering with Diane Parry, she won the doubles title at the Lausanne Open, defeating Amina Anshba and Anastasia Dețiuc in the final.

[15] At the Iaşi Open, Bondár reached the quarterfinals by defeating qualifier Marie Benoît[16] and Marina Bassols Ribera,[17] before losing to Olga Danilović.

Bondár made her Billie Jean King Cup debut for Hungary in 2015, while the team was competing in the Europe/Africa Zone Group I, when she was 17 years and 255 days old.