The operators of Mumbai International and Delhi International airports may not be able to provide enough slot capacity to carriers under the government's Regional Connectivity Scheme which launched this week. The Economic Times of India reports that twenty-four slots at Delhi and twenty slots at Mumbai are needed for the RCS flights, but both airports are struggling with capacity.

In mid-March, The Times of India reported that Delhi airport will not be able to add any additional flights between 07h00L and 22h00L this summer, while Mumbai does not have any available domestic slots at all. At a meeting of the Airports Authority of India, a SpiceJet (SG, Delhi International) spokesperson urged Mumbai International Airport Limited (MIAL) to look at allowing domestic airlines to operate late night flights.

India's RCS, also known as UDAN, aims to connect underserved areas with regular, subsidised flights. Ticket prices are capped at INR2500 (USD39) for a one-hour journey. Five airlines were awarded viability gap funding under the scheme, with about a third of the 78 routes connecting to either Delhi or Mumbai.