IndiGo and Air India Shift Selected Mumbai Flights to Navi Mumbai Airport

IndiGo and Air India Group will begin transferring selected domestic and international flights from Mumbai's Chhatrapati Shivaji Maharaj International Airport to the newly constructed Navi Mumbai International Airport in December 2026. The phased relocation establishes a long-awaited dual-airport system for India's financial capital, fundamentally altering regional traffic flows.[1][3][4]

The transition begins with Air India Express, which will launch four daily domestic flights from the greenfield Navi Mumbai facility in December. By January 2027, the carrier will introduce new international services to Kuwait and shift its existing Oman routes to the new hub to capture early demand.[1][3]

Air India Express will progressively move its operations for six West Asian destinations to Navi Mumbai. Services to Jeddah, Riyadh, Dammam, Doha, Muscat, and Sharjah will complete their transition by the start of the International Air Transport Association's Northern Summer 2027 season, establishing a significant regional footprint.[3]

IndiGo will follow in February 2027, transferring 12 daily international departures from the legacy airport to the new facility. The shift encompasses the airline's current operations to Bahrain, Riyadh, Dammam, Jeddah, Madinah, Kuwait, Ras Al Khaimah, Fujairah, Muscat, Dhaka, and Jakarta, moving substantial passenger volumes.[2][5]

Alongside the relocated routes, IndiGo will launch a new daily service to Kathmandu, bringing its international network at the new airport to 12 destinations by July 2027. The carrier will also transition the necessary domestic flights to support seamless onward connections for international passengers arriving from across India.[2][5]

Terminal 1 Redevelopment

The operational shift clears capacity ahead of a major infrastructure overhaul at the legacy airport. Adani Airport Holdings Limited, which manages both facilities, will begin redeveloping the northern section of Terminal 1 in January 2027, a project that requires significant logistical coordination to avoid mass cancellations.[3][5]

Terminal 1 currently handles domestic traffic, while Terminal 2 serves both domestic and international flights. The redevelopment project requires approximately 5 million domestic passengers annually to be redirected from Terminal 1 to Terminal 2 during the construction phase, severely straining existing gate and runway availability.[2][3]

To accommodate that domestic influx, the airport operator mandated that airlines temporarily reduce or relocate roughly 265 weekly international departure slots from Terminal 2. Mumbai's legacy airport currently handles around 770 weekly international departures operated by 46 different airlines, making the reduction a massive operational hurdle.[2]

The mandated reduction represents approximately one-third of the airport's current international departure schedule. The transition of IndiGo and Air India Express flights to Navi Mumbai absorbs a significant portion of this displaced traffic, easing the immediate pressure on Terminal 2 and preventing widespread flight groundings.[2]

Upon completion in 2030, the Terminal 1 overhaul is projected to increase the facility's annual passenger capacity by 33 percent. The upgrade will raise the terminal's throughput limit from 15 million to 20 million passengers per year, modernizing a 60-year-old structure to meet modern aviation standards.[2][3]

Airline Pushback and Capacity Disputes

The relocation plan initially faced severe resistance from the aviation industry. On October 5, the Airline Operators Committee formally challenged the directive requiring airlines to shift 33 percent of their international operations to the new airport, citing a lack of prior consultation and operational transparency.[2]

The committee demanded that the Adani Group produce records of all stakeholder consultations regarding the Terminal 1 redevelopment dating back to 2020. The group questioned the methodology used to calculate the relocation figure and sought transparency on actual capacity utilization across the airport's existing infrastructure.[2]

"Does this refer to terminal capacity, passenger traffic, flights or slots? What methodology and capacity assessment has been used to arrive at this figure?" the committee stated, questioning whether the move aligned with global slot allocation guidelines established by the International Air Transport Association.[2]

To verify the necessity of the shift, the committee requested month-wise actual capacity utilization figures for both terminals for every month of 2026. They also sought the available and declared passenger handling capacities of both facilities to ensure the mandated reductions were mathematically justified.[2]

While airlines expressed support for the necessary refurbishment of Terminal 1, the committee stated that this support did not constitute an agreement to unilaterally cancel or relocate established international routes without a detailed, transparent capacity assessment that protected carriers' historical slot investments.[2]

Strategic Expansion and Dual Hubs

The joint announcement from IndiGo, Air India, and the airport operator signals a thaw in that deadlock. By voluntarily shifting a portion of their West Asian and regional networks, the two major carriers provide the necessary operational relief for the construction to proceed without forcing involuntary cuts.[2][3]

For IndiGo, the transition serves a dual strategic purpose. Moving 12 daily departures to Navi Mumbai frees up constrained slot capacity at the legacy airport, allowing the airline to pursue broader international expansion without exacerbating congestion at India's second-busiest aviation hub.[2][5]

IndiGo plans to utilize the newly available slots to launch new services across Asia, Africa, and Europe throughout 2027. The expansion will leverage the carrier's growing fleet of Airbus A320, A321, and long-range A321XLR aircraft, which require prime departure times to maximize their extended range.[2][3]

"The phased transition will materially expand connectivity from NMIA and further expand international reach from CSMIA," IndiGo and the airport operator stated. The operators noted the move provides passengers across the region with stronger twin-airport access to a broader range of domestic and international travel.[2][5]

Final schedules for the transition remain pending. IndiGo and Air India Group will confirm exact transfer dates once project coordination with the airport operator is complete and all relevant operating approvals from civil aviation authorities are secured, finalizing the timeline for Mumbai's aviation overhaul.[2][3]