New Delhi, Oct. 25 -- IndiGo and Air India Express are preparing to move selected flights from Mumbai's Chhatrapati Shivaji Maharaj International Airport (CSMIA) to the new Navi Mumbai International Airport (NMIA) in a phased manner starting in December 2026. The shift comes as Adani Airport Holdings Ltd (AAHL) readies CSMIA's Terminal 1 for redevelopment, which is expected to require capacity adjustments by 2030.

The joint announcements, made with the airport operator on October 25, aim to redistribute traffic across Mumbai's dual-airport system while preserving airlines' historical slots at CSMIA. The moves are intended to ease congestion at the existing airport and support growing passenger demand in the Mumbai metropolitan region.

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