NEW DELHI, Oct. 13 -- Adani Airport has pushed back by at least five months its plan to shift a third of international flights from Mumbai's existing airport to its new facility in Navi Mumbai, 50 km away, after airlines resisted the proposed changes to international departure slots.

The revised timeline puts the January 2027 start of the Terminal 1 redevelopment at risk of a delay of at least three months, as the operator works to secure airlines' agreement on relocating flights and balancing traffic between the two airports.

The proposed shift from Chhatrapati Shivaji Maharaj International Airport (CSMIA) to Navi Mumbai International Airport (NMIA), both operated by Adani, had met resistance from airlines over a plan to temporarily di...