Mumbai, known as the city of dreams and home to one of India’s busiest and most crowded airports is slowly losing its long-held position as the country’s second busiest domestic aviation hub.

Bengaluru airport has now moved ahead of Mumbai in domestic passenger traffic, marking a major shift in India’s aviation landscape.

The rise of Bengaluru airport, combined with the rapid growth of Navi Mumbai International Airport (NMIA), signals a bigger transformation taking place in Indian aviation. Experts say this change is being driven not by global geopolitical tensions or the ongoing West Asia conflict, but by factors much closer to home namely airport capacity limits, airline network strategies, better infrastructure and growing passenger demand in emerging urban centres.

According to the latest passenger traffic data released by the Airports Authority of India (AAI) for April 2026, Bengaluru handled 31.78 lakh domestic passengers during the month, while Mumbai’s Chhatrapati Shivaji Maharaj International Airport (CSMIA) handled 28.93 lakh domestic passengers. Delhi remained India’s busiest domestic airport with 49.29 lakh passengers.

While Mumbai still remains ahead overall when international traffic is included, Bengaluru’s rise in domestic traffic is being seen as a significant milestone for Indian aviation.

Bengaluru’s rise to fame

Industry experts point out that Bengaluru overtaking Mumbai is not entirely new. During the Covid-19 pandemic, Bengaluru had briefly moved ahead because of city-specific restrictions imposed in Mumbai. However, this is the first time Bengaluru has surpassed Mumbai under normal operating conditions.

The biggest reason behind Bengaluru’s growth is infrastructure expansion. Over the last few years, Kempegowda International Airport has added a second runway, a new terminal and expanded apron capacity. This has allowed airlines to add more flights and increase passenger traffic without facing operational bottlenecks.

Airlines have also been strengthening Bengaluru as a major southern hub. IndiGo has expanded aggressively from the city, while Air India Express has increased operations as part of the Air India Group’s broader network restructuring strategy in South India. Some flights earlier operating through Hyderabad and Chennai have now been shifted to Bengaluru.

Unlike Mumbai, Bengaluru airport also has more operational flexibility because of available space and lower congestion levels.

Mumbai’s capacity constraints

Mumbai airport has long faced infrastructure limitations because of its single-runway operations. Even though CSMIA remains one of the busiest airports in the country, there is very limited room for expansion.

The situation resembles what happened in 2008-09, when Delhi overtook Mumbai to become India’s busiest airport. Delhi’s advantage came from larger infrastructure capacity and the ability to handle more aircraft movements, while Mumbai struggled with congestion and operational constraints.

Now, a similar shift appears to be happening again, this time with Bengaluru overtaking Mumbai in domestic traffic rankings.

Industry observers note that Mumbai airport still handles larger aircraft and more international traffic, which means the total passenger volume remains high. However, domestic traffic is increasingly being redistributed to Navi Mumbai International Airport.

Navi Mumbai airport

One of the biggest developments in Indian aviation has been the rapid rise of Navi Mumbai International Airport. The airport, which started operations in the last week of December 2025, handled 5.24 lakh passengers in April 2026 alone. Within just a few months of operations, NMIA has already entered the list of India’s top 10 busiest domestic airports.

The sharp increase came after airlines expanded services during the Northern Summer Schedule that began in late March.

For years, the Mumbai Metropolitan Region (MMR) has faced severe slot shortages at CSMIA. Airlines had limited opportunities to add new flights because the airport was operating close to maximum capacity. The opening of Navi Mumbai airport has finally created fresh room for expansion.

IndiGo, in particular, moved quickly to utilise available slots at NMIA. Several routes that were earlier operated only from Mumbai are now operating exclusively from Navi Mumbai. These include destinations such as Ayodhya, Agra, Hindon, Jabalpur and Tirupati.

Experts believe NMIA will continue climbing the rankings over the next year as more airlines shift operations there.

Bigger changes ahead

The transformation may accelerate further in the coming years.

The Adani Group, which operates both Mumbai and Navi Mumbai airports, has plans to redevelop Terminal 1 at CSMIA. Once reconstruction begins, several airlines are expected to temporarily shift more operations to Navi Mumbai.

This could result in another major jump in passenger traffic at NMIA.

However, experts believe Mumbai will continue holding its strength in international operations for the foreseeable future. Bengaluru still lags significantly behind Mumbai in international passenger numbers.

Airlines are also cautious about moving international operations to Navi Mumbai immediately because ground connectivity to the airport remains a challenge. Better road and metro links will be crucial before large-scale international transfers can happen.

Is India becoming a multi-airport cities nation?

The latest airport rankings also reflect a broader structural change happening in Indian aviation. Large metropolitan regions like Mumbai and Delhi are gradually moving toward a multi-airport system similar to cities such as London, New York and Tokyo, where passenger traffic is distributed across several airports instead of depending on a single hub.

Navi Mumbai airport is expected to play a key role in this future ecosystem by offering additional slots, lower congestion and faster aircraft turnaround times. This could particularly benefit newer airlines like Akasa Air, which require room to expand operations in busy markets.

The airport is already enabling new routes and additional frequencies that were difficult to accommodate earlier at Mumbai airport.

For passengers, the changes could eventually mean better connectivity, more flight options and reduced congestion, though much will depend on how quickly supporting transport infrastructure develops around the new airport.