What is moving and when
IndiGo, in a joint update with Adani Airport Holdings Ltd., said it will begin shifting a dozen daily overseas departures from Mumbai to Navi Mumbai in February 2027. That shift will include every existing IndiGo route from Mumbai to Bahrain, Riyadh, Dammam, Jeddah, Madinah, Kuwait, Ras Al Khaimah, Fujairah, Muscat, Dhaka and Jakarta, plus a daily Kathmandu service that is planned.
Air India Group will start relocating select Middle East flights in January and aims to wrap up the transition by the 2027 summer schedule. The carrier noted that some of these changes are subject to regulatory approvals.
Why the reshuffle matters
Mumbai International Airport is preparing to overhaul its aging Terminal 1, which means traffic must be spread between the city's two airports. Airlines had previously pushed back on moving flights out of CSMIA, but with the Adani Group overseeing both airports, the redistribution highlights its sway over capacity across India's financial hub.
As the joint release put it, "The phased transition is intended to support a transparent, equitable and proportionate rebalancing of capacity across Mumbai's dual airport system, taking into account each airline's presence at CSMIA."
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Domestic adds and the operator behind the move
Air India Express plans to start four daily domestic services from Navi Mumbai in December 2026. Meanwhile, Adani Airport, controlled by Gautam Adani, is India's biggest private airport operator; it manages eight airports in seven cities and intends to invest $11 billion to vie for a further dozen terminals by 2030.
The bottom line for investors
This is a capacity and network puzzle being rearranged in real time. For airlines, splitting operations could smooth growth as Navi Mumbai ramps up while CSMIA renovates. For Adani Airport, the dual-hub coordination and planned terminal bids point to scale expansion that could reshape traffic flows in India's busiest air market.
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