Chennai's Second Airport Hunt: How Cheyyur and Manellore Compare to India's Industrial Corridor Blueprint

Tamil Nadu has asked the Airports Authority of India (AAI) to conduct a pre-feasibility study on two shortlisted sites—Cheyyur in Chengalpattu district and Manellore in Tiruvallur district—for Chennai's second airport, weeks after Chief Minister C. Joseph Vijay dropped the earlier greenfield plan at Parandur. A team from the Tamil Nadu Industrial Development Corporation (TIDCO) has already completed first-round inspections of both locations.

The Two Contenders and Their Constraints

The Cheyyur site lies roughly 40 km from the Puducherry airport and approximately 35 km from Kalpakkam, home to India's nuclear complex. The Manellore site, situated in Gummidipoondi, is 50 km from the city and 35 km from the Sriharikota launch range operated by the Indian Space Research Organisation.

Neither site is straightforward. For Cheyyur to work, clearance from the Ministry of Defence is essential, since the Indian Air Force station at Tambaram controls the airspace over the region. Manellore presents its own difficulties: proximity to Sriharikota's restricted airspace and dense industrial congestion in the Gummidipoondi–Tada corridor mean regulatory approvals from multiple agencies—defence, environment, and aviation—will not be automatic.

• ▸AAI's pre-feasibility report will determine which site advances; the State government has indicated a final call only after this report is submitted.
• ▸Both sites face the challenge of multi-agency clearances (Defence, Environment, AAI airspace norms).
• ▸TIDCO conducted first-round inspections before formally handing over technical assessment to AAI.

Why a Second Airport Matters for Chennai's Growth

Chennai's existing airport handled over 22 million passengers in 2024, operating near peak runway capacity. A second airport is not merely a comfort upgrade—it is an economic necessity tied to the city's positioning within India's broader industrial-corridor strategy. Air cargo throughput, which underwrites electronics manufacturing and pharmaceutical exports, depends on slot availability, and Chennai has consistently lost freight to Bengaluru and Hyderabad precisely because of runway saturation.

This is where the Amritsar–Kolkata Industrial Corridor (AKIC) blueprint becomes instructive. The AKIC, a USD 4.2 billion project with a ₹2,800 crore central grant and USD 1.5 billion in predominantly logistics-firm private equity, targets a reduction in container dwell time from 48 hours to 22 hours across a 1,200 km upgraded rail corridor. Similarly, the Delhi–Mumbai Industrial Corridor (DMIC), which carries a USD 90 billion total cost and a 1,800 km high-speed freight line, embeds six airports and three ports as integral nodes. Both corridors treat multi-modal logistics—including secondary airports—as foundational, not auxiliary, infrastructure.

The Comparative Corridor Logic

The way AKIC and DMIC integrate air freight into industrial logistics offers a template for what Tamil Nadu should now demand from whichever site wins:

• ▸AKIC: 4 mega-industrial zones, 1,200 km of upgraded railway line, USD 1.5 billion private equity, and a targeted dwell-time cut from 48h to 22h.
• ▸DMIC: 9 mega-industrial zones (each ~225 km²), 4,000 MW dedicated power plant, 1,800 km freight corridor, 6 airports, 3 ports, USD 12 billion Japanese equity.
• ▸CBIC: USD 3.8 billion total outlay with ₹2,200 crore central grant, 3 mega-industrial zones, and direct integration with the Chennai–Bengaluru Expressway (2025–26).

Chennai sits at the southern anchor of the Chennai–Bengaluru Industrial Corridor (CBIC), and a second airport—whether at Cheyyur or Manellore—would serve freight demand not just for Tamil Nadu but for the wider CBIC catchment. However, corridor economics depend on logistics cost competitiveness, and without a second airport, Chennai risks ceding export-oriented manufacturing to rival corridors.

Defence Airspace vs. Industrial Ambition

The Ministry of Defence clearance hurdle at Cheyyur is not a formality. Tambaram's airspace restrictions already constrain building heights and flight paths across large parts of southern Chennai and Chengalpattu. Manellore's proximity to Sriharikota adds the ISRO launch corridor, an even harder constraint because rocket-stage drop zones are rarely reassigned.

Industrial-corridor projects elsewhere in India have navigated similar dual-use airspace challenges through dedicated clearance protocols, but typically over years of negotiation. For Tamil Nadu, the AAI study is the first formal gate, and the State will need to coordinate with the Ministry of Civil Aviation, the Indian Air Force, and ISRO simultaneously rather than sequentially if it wants to avoid the multi-year delay that eventually felled the Parandur project.