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Mumbai’s aviation network is bracing for a major shake-up from October 1, 2026, as multiple reports indicate that roughly one-third of flight movements currently handled by Chhatrapati Shivaji Maharaj International Airport could be redirected to the new Navi Mumbai International Airport, in a move closely tied to the planned redevelopment of Mumbai’s busy Terminal 1.
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What Is Expected to Change From October
Recent coverage across Indian business and travel outlets describes a transition plan in which close to 30 percent of international flights now using Mumbai’s main airport are expected to move to Navi Mumbai International Airport from October 1, 2026. The reported figures translate into around five million international passengers a year shifting to the new hub, significantly easing pressure on the existing facilities at Chhatrapati Shivaji Maharaj International Airport.
Several reports also refer to a wider redistribution of traffic, with at least one-third of overall air traffic movements potentially moving out of the current airport ecosystem. Part of that shift is expected to happen within Mumbai’s existing infrastructure, as a portion of flights using the domestic-only Terminal 1 is prepared for transfer to Terminal 2 later in October.
Publicly available planning documents and past regulatory filings have long signalled that Navi Mumbai would absorb a share of Mumbai’s growth once it became operational. The emerging October 2026 timelines now indicate that this transition is moving from concept to implementation, with the traffic redistribution framed as a key prerequisite for major construction work at the older domestic terminal.
Why Traffic Is Being Diverted to Navi Mumbai
Mumbai’s main airport routinely ranks among India’s busiest, handling more than 40 million passengers annually and operating on a constrained airfield layout that lacks full parallel runways. Industry analyses and parliamentary discussions have repeatedly highlighted structural and safety challenges, as well as the difficulty of accommodating further growth at the current site without extensive rebuilding.
Published coverage of the redevelopment plan shows that Terminal 1 is slated for phased demolition and reconstruction starting in January 2027. To make room for that work, airlines using the domestic terminal are expected to relocate some services to Terminal 2, while a share of international and potentially select domestic routes shift to Navi Mumbai. The combination is intended to create the spare capacity needed to keep Mumbai’s air network functioning while large sections of infrastructure are offline for several years.
Navi Mumbai International Airport itself has been designed as a long-term relief valve for the Mumbai Metropolitan Region, with planning documents stating that its first development phase aims to handle around 20 million passengers a year. Earlier test operations, including trial landings and systems checks, were framed as steps toward full commercial service. The anticipated traffic shift in October 2026 would mark the first large-scale use of that capacity for scheduled international flights linked directly to Mumbai’s existing network.
What Passengers Need to Watch For
For travellers, the biggest immediate change is the possibility that flights previously operating from the centrally located Mumbai airport could instead depart from or arrive at Navi Mumbai. Reports in travel media and aviation outlets are already advising passengers with bookings beyond September 30, 2026, to monitor airline notifications closely and to verify both the airport and terminal listed on their tickets.
The two airports sit on opposite sides of the metropolitan area, and onward transport options differ significantly. Reaching Navi Mumbai International Airport generally involves longer road journeys from central and western parts of the city, and public commentary has frequently raised concerns about road connectivity and travel times. Travellers may need to allow additional time for congestion, toll corridors and unfamiliar access routes, especially in the early months after the shift.
Those continuing to use Chhatrapati Shivaji Maharaj International Airport will also see changes. Part of the domestic schedule currently using Terminal 1 is expected to move to Terminal 2 from late October, which may affect check-in locations, security queues and baggage claim arrangements. Aviation reports suggest that passengers flying on low-cost carriers that traditionally used Terminal 1 should pay careful attention to updated travel advisories and airport maps in the lead-up to the changes.
Impact on Airlines and Mumbai’s Aviation Hub Status
The redistribution of flights between Mumbai and Navi Mumbai is likely to reshape airline strategies across western India. Coverage in business media notes that some carriers are evaluating which routes can be economically shifted to the new airport, taking into account operating costs, ground handling arrangements and the convenience of passengers who live closer to one side of the metropolitan region than the other.
Analysts cited in public discussions have pointed out that landing and parking charges at a new facility such as Navi Mumbai may offer financial incentives for airlines, particularly for point-to-point routes and services aimed at travellers based in Navi Mumbai, Thane and other satellite cities. At the same time, full-service carriers with large international networks may be cautious about fragmenting their operations between two airports, which can complicate connections and increase costs.
On a national scale, Mumbai’s role as one of India’s primary international gateways is unlikely to diminish, but it may become more geographically distributed. With Navi Mumbai progressively taking on a greater share of movements and the existing airport undergoing reconstruction, the region’s combined capacity could eventually surpass current levels, reinforcing Mumbai’s position in competition with Delhi, Bengaluru and Hyderabad for long-haul and regional traffic.
Uncertainty and Next Steps
Despite the growing volume of reports about the planned October 2026 changes, there is still some uncertainty around the final flight schedules and the exact proportion of services that will move. Recent coverage has highlighted that a widely circulated social media message about one-third of traffic shifting was not an official communication from the airport operator, and airlines continue to refine their deployment plans for the winter season.
Nevertheless, the direction of travel appears clear: Navi Mumbai is expected to play a much more prominent role in handling both international and domestic movements linked to the Mumbai region, while the existing airport prepares for years of major construction. Further details are likely to emerge as slot allocations are finalised, bilateral route announcements are made and travel companies update itineraries and booking engines.
For now, the most practical advice from publicly available guidance is for passengers to stay alert to updates, especially for journeys scheduled from early October onward. As the two-airport system beds in, Mumbai-area travellers may find themselves weighing not just airline and fare, but also which side of the metropolis they prefer to fly from and how much extra time they are willing to build into their journey to the airport.
Business Standard: 5 million international flyers to shift to Navi Mumbai airport from Oct 1
ETInfra: Mumbai airport to begin partial T1 demolition from January 2027 amid flight shifts
News21: Mumbai Airport traffic shake-up as nearly 30% of international flights set to shift
Free Press Journal: Major update on Mumbai international flights from October 1