The redevelopment of Terminal 1 at Chhatrapati Shivaji Maharaj International Airport (CSMIA) will keep 91% of international passenger traffic on schedule, ET Railways reported.

Out of the 50 airlines serving CSMIA, 39 will continue operations there; the remaining 11 may shift select services to Navi Mumbai International Airport beginning March 2027.

The project will lift Terminal 1's annual passenger-handling capacity by 33%, taking it to 20 million in 2029, and fits within a wider effort to modernise airport infrastructure while keeping disruption to most international flights minimal.