Pakistan's civil aviation authority has issued a fresh Notice to Airmen — the bureaucratic instrument that makes airspace policy real — extending the closure of Pakistani skies to all Indian-registered aircraft, leased aircraft operated by Indian carriers, and Indian military flights through August 23, 2025. The language in the NOTAM is unambiguous: no exceptions, no corridors, no carve-outs for humanitarian or commercial transit.

The closure dates to late April 2025, when the Pahalgam terrorist attack in Indian-administered Kashmir killed dozens of tourists and sent bilateral relations into a freefall not seen since Balakot. Both governments imposed mirror-image airspace bans within days of each other — a tit-for-tat that has now hardened from emergency measure into something resembling permanent policy, extended at intervals by fresh NOTAMs rather than unwound by diplomacy.

For Indian carriers, the arithmetic is brutal. Flights from major Indian hubs to destinations across Central Asia, the Gulf, and Europe that once tracked north-northwest over Pakistani territory must now route around it entirely — adding anywhere from 90 minutes to over two hours of flight time depending on the destination. That means more fuel burn, more crew hours, more aircraft cycles, and fares that either rise or margins that get squeezed. Long-haul westbound routes bear the worst of it.

Pakistani carriers are not immune. Indian airspace has been symmetrically closed to Pakistani aircraft, cutting off the most direct routing for flights heading east toward Southeast Asia and beyond. What was engineered as economic leverage has become a shared tax on both countries' aviation sectors — the kind of mutually assured inconvenience that usually creates pressure to negotiate. So far, it hasn't.

The broader context is a relationship that has effectively frozen at the institutional level. Cross-border trade suspended, the Indus Waters Treaty placed under unilateral review by New Delhi, diplomatic staff reductions ordered on both sides — the airspace ban is one plank in a much larger edifice of hostility. Neither government has publicly proposed a framework for unwinding it, and the rolling NOTAM extensions suggest Islamabad is comfortable, for now, treating the closure as a default state rather than an exceptional one.

What neither capital is discussing openly is the third-party cost. Airlines from other countries that once used Pakistani airspace as a transit corridor for routes connecting South Asia to Europe now face secondary complications — rerouting around an increasingly congested set of alternatives. The Himalayan corridor and the routes threading through Central Asian airspace were not designed to absorb the volume that Pakistani closure pushes onto them.

From Islamabad's vantage point, the closure carries a certain leverage logic: India's aviation sector is larger, its international route network more exposed, and its carriers more dependent on westbound Pakistani overflight rights than Pakistan's carriers are on the reverse. Holding the ban in place costs Pakistan less than it costs India — which may explain why extension after extension has come without apparent political cost to the Pakistani government domestically.

What remains genuinely unresolved is the end condition. Pakistan has not stated what India would need to do — diplomatically, militarily, or in terms of the Pahalgam investigation — for the skies to reopen. India has not publicly made a formal request or offered a concession. The NOTAM runs through August 23. After that, another extension is the default expectation. The two most populous countries on earth, separated by one of aviation's most strategically valuable corridors, are flying around each other — and calling it a policy.