India put 22.7 million airline seats on sale in September, 4.5 percent fewer than a year earlier. Domestic flying fell harder than international flying. Fifteen million domestic seats is a 5.6 percent cut. Seven point seven million international seats is a 2.1 percent cut. Low-cost carriers still hold 69 percent of the market with 15.7 million seats, themselves down 4 percent. The country is not adding metal. It is concentrating what metal it has. Delhi is the only true mega-hub still growing. OAG schedules show 2.71 million domestic seats through the capital, up 5.9 percent. That is a million more domestic seats than Mumbai. Across all flying, Delhi state offers about 3.8 million seats, up 5.7 percent. Pune is the other exception among large fields, up 9.4 percent to 560,000 seats. Almost everyone else is shrinking. Mumbai is down 6.3 to 6.5 percent to 1.72 million. Bengaluru is down 8.3 percent to 1.55 million. Hyderabad is down 14.7 percent to about 1.02 million. Kolkata is down 19 percent to 730,000. Chennai is down 13.4 percent to 700,000. Ahmedabad is down 13.5 percent to 450,000. Guwahati is down 12.1 percent to 290,000. Kochi is down 10.2 percent to 260,000. Kerala’s statewide capacity is off 26.2 percent. West Bengal is off 16.8 percent. Tamil Nadu is off 12 percent. The official story of Indian aviation is still UDAN, new terminals and 100 more airports. The September timetable is a vote for Delhi.
Airlines explain the cut with fuel and war. ATF is still far above last year’s price. West Asia airspace remains expensive and uncertain. SpiceJet’s September seats have collapsed 45.2 percent to 261,000. Air India is down 8.8 percent to 3.22 million. Air India Express is down 2.6 percent to 2.54 million. IndiGo, which is the market, is down 4.1 to 4.5 percent to about 11.26 million seats. Akasa is the only Indian carrier adding metal, up 5 percent to 836,940. Emirates is barely up. Singapore Airlines, Qatar, Etihad and Air Arabia are all down. That mix does not by itself explain why Delhi grows while Hyderabad and Kolkata bleed. Delhi has the thickest connecting bank, the most corporate traffic, the strongest international feed and an airport operator that can still find gates when others cannot. Mumbai remains slot-tight and monsoon-fragile. Bengaluru and Hyderabad have been living with high utilisation and, this year, weaker route economics once fuel rose. Kolkata’s drop is the sharpest among the big six and sits on an AAI field, which should worry anyone who thinks public ownership automatically protects regional capacity. The busiest city pair still points at the capital. Mumbai-Delhi has 677,300 seats this month, up 13.9 percent. Bengaluru-Delhi and Kolkata-Delhi are up even as those origin airports shrink overall. Capacity is not leaving India so much as it is walking toward one runway system.
Policymakers keep announcing airports in the hinterland. Schedulers keep protecting the one city that can fill a 737 at a fare that still covers ATF. If Delhi is winning because yields and connections are better, that is rational airline maths. If it is winning because other airports cannot offer night operations, reliable fuel, spare gates or a tax regime that lets a thin route live, then the map is recentralising by default. Either way, September’s 22.7 million seats are a warning. A market that is 4.5 percent smaller than last year is not a boom paused. It is a network choosing a capital and leaving the rest of the country to argue about terminals that have fewer flights to fill.