Mumbai’s Chhatrapati Shivaji Maharaj International Airport (CSMIA) will temporarily close Terminal 1 as a part of a renovation project that will last three years. The initial phase involves the demolition of the existing structure starting from November 2025, followed by construction of the new terminal.
In an official statement, the airport authorities said that once complete, the new terminal will be able to manage 20 million passengers annually, an impressive 42% boost in capacity, reflecting the dynamic growth of Mumbai.
This ambitious project will redefine passenger experience and set an unprecedented standard in sustainability and innovation.
As Mumbai continues to soar as an international aviation hub, the new terminal, with a built-up area of over two million sq. ft., is poised to become a hallmark of digitisation and consumer convenience. The redevelopment of Terminal 1 will be carried out in phases to minimise disruption to airport operations.
Throughout the process, MIAL will ensure that passenger convenience and safety remains a priority. CSMIA T2, along with Navi Mumbai International Airport, scheduled to be operational in 2025, will manage the capacity gap created by the demolition of T1.
The reason for the renovation is attributed to structural and safety issues. The existing Terminal 1 of Mumbai airport consists of three sections, 1A, 1B, and 1C, all of which were built in different decades. Terminal 1A was constructed in 1992, while Terminal 1C was added in 2010. Terminal 1B, constructed in 1965, showed several flaws during an inspection conducted in August 2017.
Speaking on the development, Jeet Adani, Director, Adani Airport Holdings Limited said, “This redevelopment is not only about expanding capacity—it is about future-proofing our city’s place on the global stage.”
The decision is expected to impact major airlines such as IndiGo and Air India. Discussions are ongoing to provide alternatives for these airlines to avoid disruptions during the renovation.
The reconstruction proposal was first submitted by GVK to the Airports Economic Regulatory Authority in three stages before the Adani Group acquired Mumbai International Airport Limited four years ago.
Phased Transformation and Passenger-Centric Focus
In November 2025, the transformation of Terminal 1 will proceed in carefully planned phases, ensuring minimal disruption. During the construction, Terminal 2 (T2) will shoulder the additional traffic. Advanced technologies such as DigiYatra, self-baggage drop, and e-Gates will ensure smooth passenger movement despite the increased footfall. Additional service staff will be deployed at key locations to assist passengers during peak travel periods. Airlines and other stakeholders will be informed well in advance to ensure uninterrupted flight schedules.
Global Benchmark for Eco-conscious Airport Design
Upon completion in 2028-29, the new Terminal 1 at CSMIA will stand as a beacon of sustainable innovation, setting a global benchmark for eco-conscious airport design. T1 at CSMIA aspires to be India’s first brownfield, biophilic, sustainable airport.
Passenger convenience and experience is at the core of the new T1 design. It will include:
Currently, CSMIA serves 5.1 crore passengers annually. Terminal 2 handles 4 crore passengers, while Terminal 1 accommodates 1.1 crore passengers.
Navi Mumbai Airport will initially have the capacity to handle 2 crore passengers per year. Until the new T1 is completed, T2’s capacity will temporarily increase to 4.4 crore passengers.