Mumbai Airport Terminal 1B Redevelopment Set for January 2027

October 6, 2026 — Chhatrapati Shivaji Maharaj International Airport (CSMIA) in Mumbai, India, is set to commence redevelopment of the north section of its Terminal 1B starting in January 2027. The project, announced today by Adani Airports, which operates CSMIA, aims to modernize the facility but will necessitate the temporary shifting of some airline operations and is projected to affect approximately 9% of the airport's total passenger traffic.

Adani Airports stated the decision to begin the redevelopment in January 2027 stems from safety concerns related to the current infrastructure of Terminal 1B. The extensive work is expected to cause significant changes to passenger flow, with certain domestic airlines currently operating from Terminal 1 likely to relocate to Terminal 2 during the construction phase.

Operational Impact and Passenger Rerouting

The redevelopment will primarily impact domestic airlines, which predominantly utilize Terminal 1. Authorities estimate that around 5 million passengers will be affected by the temporary operational shifts. While specific airlines have not been named in initial reports, the move is designed to ensure continued service with minimal disruption, albeit with changes to passenger routines.

Discussions between Mumbai airport authorities and airlines regarding the logistics of shifting operations to the larger Terminal 2 are ongoing. This coordination is crucial to manage passenger expectations and maintain operational efficiency during the transition and construction periods. The redevelopment aims to enhance capacity and modernize facilities at one of India's busiest airports.

Project Scope and Future Benefits

The redevelopment plan for Terminal 1B includes significant upgrades to infrastructure, passenger amenities, and operational efficiency. The project is part of a broader strategy by Adani Airports to improve the overall passenger experience and accommodate future growth in air travel demand.

While the immediate impact will involve logistical adjustments for both airlines and passengers, the long-term benefits are expected to include increased capacity, improved safety standards, and a more modern and efficient terminal environment. The specific duration of the redevelopment project has not been publicly detailed, but it is anticipated to be a multi-year endeavor.

Mumbai Airport remains a critical hub for domestic and international travel in India. The upcoming redevelopment project underscores the continuous effort to upgrade aviation infrastructure to meet evolving industry standards and passenger needs, despite the temporary inconveniences it may cause.