India’s biggest domestic airline, IndiGo, plunged into a severe operational meltdown, canceling over 1,000 flights on December 5, 2025 alone, according to regulators. The upheaval has exposed deep planning failures just as the nation’s busiest travel season gets underway, leaving thousands of travellers stranded and triggering a broader crisis across Indian aviation.
So what exactly happened?
- December 5 saw more than 1,000 flights cancelled nationwide by IndiGo.
- The disruption marked the fourth straight day of cancellations and delays.
- All domestic departures from Indira Gandhi International Airport (Delhi) were grounded until midnight, creating chaos at major hubs such as Delhi, Mumbai, Bengaluru, Hyderabad, Chennai and more.
- On-time performance (OTP) at major airports collapsed to as low as 8.5 percent.
- Airport terminals overflowed with frustrated travellers. Reports speak of long queues, unclaimed luggage accumulating, and scenes of protest and anger among stranded passengers.
As conditions deteriorated, IndiGo CEO Pieter Elbers issued a public apology on X on December 5, acknowledging significant disruptions to the airline’s operations. He stated that IndiGo expected its schedule to stabilise gradually between December 10 and 15, with full normalcy aimed for February 10, 2026. In an effort to reduce passenger inconvenience, the airline waived cancellation and change fees for bookings made between December 5 and 15, initiated automatic refunds, and provided support measures including meals, hotel accommodation, and assistance with baggage.
But why did this crisis unfold? For those still wondering, the answer lies in a combination of regulatory change, planning failures, and compounding operational stress.
The core issue: New pilot rest and duty regulations
At the centre of the current disruption are the newly implemented crew-rest and duty-time regulations introduced by the Directorate General of Civil Aviation (DGCA), known as the Flight Duty Time Limitations (FDTL) norms. Aimed at enhancing flight safety by reducing pilot fatigue, these rules were introduced in phases, with the final set taking effect on November 1, 2025.
Key changes under the revised FDTL norms:
- Weekly rest period for pilots increased from 36 to 48 hours.
- Night duty hours redefined: “night” now runs from midnight to 6 a.m. (previously midnight to 5 a.m.).
- Stringent limits on night flights: a pilot cannot handle more than two night landings per week, and cannot be rostered for more than two consecutive nights.
Compliance with the new fatigue-protection regime collided head-on with IndiGo’s high-utilization, cost-efficient business model, exposing a lack of buffer in crew strength.
Though FDTL compliance was the primary trigger, several additional factors made the disruption worse.
Overreliance on a tight crew roster and high utilisation
IndiGo’s operating strategy has traditionally relied on keeping its aircraft and crew in constant rotation to maximise efficiency. However, the sudden requirement to significantly increase crew rest periods and scale back night-time operations disrupted this model. A report by
The Times of India noted that the airline maintained only a minimal buffer, often just about 4% of its total crew, to deal with unexpected situations, and did not expand this margin even as travel demand grew. This planning shortfall persisted despite the industry having more than a year’s advance notice before the full FDTL rules came into effect.
Winter schedule pressure and high demand season
The cancellations have hit at a peak travel season in India, December, when families travel for holidays, weddings, and festive gatherings.
Chain reaction from delays, weather, and technical issues
The aforementioned report also states that Indigo spokesperson cited winter-season weather and ground-handling constraints, especially at congested northern airports, as reasons for disruptions.
DGCA order
Regulatory response and shift in strategy
Faced with mounting public outrage, pressure from government and regulatory authorities, and disruption across the national aviation network, regulators stepped in.
- On December 5, the DGCA issued a temporary exemption for IndiGo from some of the stricter FDTL provisions.
- Specifically, the provision that barred substituting weekly rest with leave was withdrawn, restoring some scheduling flexibility.
What this means for passengers, airlines and India’s aviation sector
For passengers
- Many travellers across the country remain stranded, with next-available flights either sold out or priced extremely high. Reports from major airports such as Mumbai describe crowds, long queues, gate-area chaos, failed communication on flight status, and situations where travellers waited for hours with little support.
- Airfares on alternative carriers have surged on heavily traveled routes such as Delhi–Mumbai, Delhi–Bengaluru, and so on.
- Many are calling the crisis a major disruption especially as it hit the peak season just before Christmas and winter holidays.
Indigo statement
Passengers affected have been advised to check flight status via IndiGo’s website or official social media handle (@IndiGo6E), and to take advantage of the airline’s offer of fee-free cancellations or rescheduling until December 15. Some have been offered support such as hotel stays, meals, and baggage assistance depending on the disruption.
For passengers with travel planned in the coming weeks, experts advise: keep a close eye on flight status, check for alternatives early (trains, other airlines), and avoid last-minute bookings if possible until the situation stabilises.
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