Over 70 per cent of Jet's fleet has been grounded, leading to massive cancellations.
The airline informed the ministry that it would operate 75 planes by April-end.
Of 1,400 pilots the airline has, 200 have quit in the past few months because of salary delays.
'There will be no flying unless the company pays us substantial salaries and provides a road map,' the National Aviators Guild, the pilots union, said in a message to its members.
Jet has pulled out flights from Northeast states and also cancelled its Srinagar flight, leading to reduction in capacity.
The first tranche of $31 million was due on March 11, while the second instalment of $109 million was due on March 28.
The deal will give India's largest conglomerate indirect stakes in seven airports in India and abroad.
Jet's operating fleet reduced from 103 planes in October 2018 to 35 now, leading to massive cancellations and a surge in airfares
Bids to be evaluated according to guidelines by the civil aviation ministry, following which a buyer will be selected. Transfer of control to the buyer to be effected by June-end.
While the airline is accommodating passengers on available flights, this is resulting in extending travel time and detour for customers.
Jet has proactively undertaken certain operational adjustments to its flight schedule, keeping in mind the likely, yet interim non-availability of some aircraft in its fleet in the foreseeable future.
Demand for the earlier variant 737NG planes is also expected to pick up due to the grounding of MAX planes.
SpiceJet had bet its fortunes heavily on the new version of the 737 of which it has 13 planes in its fleet and another 193 aircraft on order
The airfares are already 15 per cent higher than last season and due to this shortage it will go higher, said Sharat Dhall, COO of Yatra.com.
It neither mentions timelines for refund or compensation, nor talks about penal provisions for airlines.
It has a fleet of 47 planes including 17 Airbus A320Neo. The remainder include Airbus A320Ceo planes.
IndiGo's situation points to a deeper malaise where skill shortage can challenge India's status as the fastest-growing aviation market, say experts.
Domestic air traffic clocked slowest growth in 4 years on high fares and flight cancellations.
Additionally, promoter Naresh Goyal and Etihad Airways, which owns a 24 per cent stake in the airline, will infuse around Rs 2,000 crore into the airline, sources aware of the development said.
To maintain smooth flight operations and avert a staff crisis, India's airlines will require an additional 2,000 pilots. Unfortunately, the number of additional commanders being recruited is slowing down.