The actresses, who both part-own cricket teams in the Indian Premier League, had recently stopped speaking to each other, according to The Times of India.
Zinta apparently upset the Celebrity Big Brother winner after questioning how she was able to afford a wide range of designer clothes and accessories.
However, the two stars are said to have made up while sharing a long flight together.
Both Bollywood heroines have only made cameo appearances in recent films, with neither being seen on screen in a lead role since 2008.
Zinta told DS last year, though, that she is planning to focus more on her career in Indian cinema, saying: "It is only movies, movies and movies for me... I am really excited and I am coming back with some really fun things."