Air India said on Monday it would stop services between the capital cities of India and the U.S. from September 1, citing aircraft shortage due to the planned upgrades to its ageing Boeing planes and the closure of Pakistan's airspace.

Air India will stop commercial flights between New Delhi and Washington, the company said on Monday, citing a "combination of operational factors". The airline, owned by India's Tata Group, cited a looming shortage of planes and Pakistan's decision to close airspace as the main reasons for the cancellation of flights to and from the US capital.

Air India will suspend services between New Delhi and Washington, D.C. from September due to aircraft shortages caused by upgrades to its Boeing planes and as Pakistan's airspace ban for Indian carriers affects its international routes.

Air India is blaming an upgrade program for its Boeing 787s, among other things for issues with flying to Washington DC.