Mumbai International Airport Ltd has threatened to cut 265 weekly international departure slots at Terminal 2 from October 25.
That is about 33% of the 770 weekly international departure slots at the terminal.
MIAL cited the redevelopment of Terminal 1, which requires moving about 5 million passengers a year to Terminal 2.
Airlines have until 4 pm on October 6 to name the slots to be discontinued.
IATA has opposed compulsory relocations.
Mumbai International Airport Ltd, or MIAL, has threatened to temporarily discontinue 265 weekly international departure slots at Terminal 2 from October 25, 2026.
The cut would be about 33% of the 770 weekly international departure slots at the terminal.
The reduction would affect 46 airlines.
MIAL cited a dispute with airlines over the transition linked to the redevelopment of Terminal 1.
The redevelopment requires moving about 5 million passengers a year from Terminal 1 to Terminal 2.
IndiGo faces a cut of 74 weekly slots and Air India 33.
Emirates and Etihad Airways each face a cut of 10 weekly departures.
Akasa Air faces a cut of 11 slots, Air India Express 7 and SpiceJet 5.
MIAL has asked airlines to identify the specific departure slots they want to discontinue by 4 pm on October 6.
For airlines that do not respond, MIAL will decide the cuts itself.
The International Air Transport Association, or IATA, has opposed compulsory airline relocations.
IATA has argued for voluntary transfers and for protecting existing slot entitlements during the transition.
A slot is the approved time at which an airline may take off from or land at an airport.
The reports did not include a direct statement from the government or the airlines on the proposed cut.
Mumbai’s Chhatrapati Shivaji Maharaj International Airport has two terminals, Terminal 1 and Terminal 2, and Terminal 2 opened in 2014.
Chhatrapati Shivaji Maharaj International Airport, Mumbai (file image), Wikimedia Commons, CC BY 4.0