IndiGo Chief Executive Officer (CEO) Ronojoy Dutta and Qatar Airways CEO Akbar Al Baker signed the codeshare agreement in New Delhi.
The scrip of India's largest private airline, IndiGo, climbed 5.36 per cent to Rs 1,485.95 on the BSE.
The company had a loss of Rs 651.5 crore in the same period a year ago.
The stock of India's largest private sector airline declined 2.22 per cent at Rs 1829.35, on the BSE.
Gangwal said the board has now approved a new related-party transaction policy and to also close an open issue.
The differences between the two promoters came into the public after Rakesh Gangwal had sought Sebi's intervention.
In July, Rakesh Gangwal flagged concerns over alleged corporate governance lapses at InterGlobe Aviation.
Sebi and the corporate affairs ministry are looking into the alleged governance lapses at InterGlobe Aviation.
The company has reported the highest ever quarterly profit after tax in the latest June quarter.
The board discussed about appointing a woman director, said CEO Ronojoy Dutta.