New Delhi, July 22 -- Air India's loss is IndiGo's gain.

While the Tata group carrier lost domestic market share amid months of operational disruptions and capacity cuts, IndiGo's share climbed to a record high, with nearly two out of every three passengers in India flying on the country's largest airline.

In June, the budget carrier's domestic market share expanded to 66.3%, while the Air India group's share fell to 23.9%, showed data released by the Directorate General of Civil Aviation (DGCA).

A year ago, IndiGo, owned by InterGlobe Aviation Ltd, held a 64.5% share and the Air India group, which includes full-service carrier Air India and budget airline Air India Express, accounted for 27.1%.

The shift has largely been driven by ca...