It has posted losses in four consecutive quarters as higher operating costs wiped out revenue gains.
IndiGo declined to comment on the matter
A source said Mills was leaving the airline as he was not getting operational freedom to run the organisation.
IndiGo's passenger load factor, at 67% in July, fell six percentage points from the same month last year.
Of the 243 listed flights, it claimed to have operated 75 across the country after 1600 hours on Wednesday.
Singh holds more than 36.15 crore shares.
Indigo has zero competition on 61.2 per cent of its 838 domestic routes.
Troubled carrier SpiceJet has paid employees' salaries for November and cleared dues of fuel companies as well.
Low-cost carrier SpiceJet on Friday said it has launched a 'Home Away Insurance' for all its customers in collaboration with insurance firm Tata AIG.
The prospective owners of Indian low-cost carrier SpiceJet Ltd plan to cut the airline's fleet, shrink its network and return to a "plain vanilla" business model to achieve profitability, two people close to the investors said.
No-frills carrier SpiceJet is in active discussions with Singapore-based budget carrier Tigerair for a possible stake sale even as they are set to sign a code share agreement soon.
The airline has launched a series of discount offers since January this year.
Shares of SpiceJet zoomed almost 20 per cent on Friday on expectations of revival of the distressed air carrier.
There was no loud noise of anything breaking when the rods of a portion of a roof collapsed at the Delhi airport's Terminal-1, Krishna Kumar, a cab driver who was at the site of the incident, said on Friday.
Latter's market share rises to 36.1% in Dec; best on-time performance across metro airports
Clearance of dues is a key step in airline's revival.
Budget carrier SpiceJet on Wednesday joined the low fare race in the domestic market putting on the block half a million seats with ticket prices starting at Rs 1,499 under a limited period promotional offer.
No-frills airline SpiceJet on Wednesday launched yet another round of limited-period low fare offers to fill its seats for travel between July and September when air travel generally slumps.
Oil firms will supply fuel to SpiceJet on 'cash and carry basis'.
India must address issues that are plaguing its aviation sector.
The on-time performance (OTP) of Indian carriers took a major dip in January as dense fog foiled their flight schedules. According to data from the Ministry of Civil Aviation reviewed by Business Standard, five out of six major Indian carriers - IndiGo, Air India, AIX Connect, Akasa Air, and Vistara - recorded their lowest OTPs in at least the last 11 months. In response to queries, an Air India spokesperson said that during this winter, northern India experienced unusually prolonged periods of dense fog affecting traffic at the airline's two largest hubs -- Delhi and Mumbai.
Things don't seem to be good at low fare carrier SpiceJet's office. In past few months, its top rung officers have resigned over differences in opinion with the management.
Kalanithi Maran's stake in the no-frills airline has increased by nearly 6 per cent to 22.05 per cent due to allotment of equity shares following conversion of convertible debentures.
The offer is applicable to airline's all domestic destinations, including Mumbai, Delhi, Kolkata and Chennai, a company official said.
The airline, which posted an annual loss of Rs 191 crore (Rs 1.91 billion) for the past financial year, has been looking to raise funds for months.
In an email, a SpiceJet spokesperson said: "A few foreign airlines/investors have evinced interest in SpiceJet. It will be very premature to comment on the possibilities of any fresh equity issuance to such interested parties."
India is not an easy environment to operate in and grow because of the high cost of operations, says Neil Mills.
Sun Group chief Kalanithi Maran and his wife Kavery Maran have resigned from one of the promoter entities of SpiceJet, triggering speculations about a possible sale of Maran family's majority stake in the air carrier.
Even as it is expected to post a net loss, the Delhi-based no-frills airline SpiceJet is reducing its financial year to ten months ending March 31, 2007, for operational reasons.
As full-service carriers hiked fares and surcharges due to skyrocketing jet fuel prices, the no-frill ones have launched special offers with SpiceJet on Thursday announcing the sale of three lakh tickets for Rs 3 each plus taxes and surcharge from Friday.
Low-cost carrier SpiceJet's share price went up 9.5 per cent at the Bombay Stock Exchange today in an otherwise flat market fuelled by speculation that the airline was in merger talks with another Delhi-based low-cost carrier, IndiGo.
No frills carrier SpiceJet on Monday cut down base fare for its evening flights to Kathmandu to Re 1 for two days starting on Monday.
Jet Airways faces similar setback.
Sources aware of the development said as part of the project, the airline had signed an agreement with Reliance Industries Ltd, which would extend quality control services at its coastal terminals for ATF imported by the airline.
Move aims to comply with Sebi's norm
SpiceJet has held "preliminary discussions" with a Gulf airline for potential investment in the Indian budget carrier, a news report has said.
HC asks DGCA not to de-register SpiceJet planes till April 6.
US-based co-working operator WeWork, Lowe's India, SpiceJet and startups like CureFit stepped in to offer employment to the distressed workers at Jet.
With the new fleet of Bombardier Q400 aircraft, the Kalanithi Maran-promoted airline aims at reaching more hinterland of northern Indian and connect more Tier II and Tier III cities on its network.