Aviation regulator Directorate General of Civil Aviation (DGCA) is investigating the widespread disruption plaguing the flight operations of India’s largest airline IndiGo , which led to the cancellation of at least 38 flights at Delhi’s Indira Gandhi International Airport (IGIA) on Wednesday.

The regulator also asked IndiGo to detail the reasons behind the large number of flight delays and cancellations, and sought a plan from the carrier to mitigate the crisis.

At airports across India, over 150 IndiGo flights are estimated to have been cancelled, with many more facing long delays on Wednesday.

Flights departing from Delhi ’s IGIA were delayed by an average of 50 minutes, according to live flight tracking website Flightradar24. Arrivals were relatively smooth with an average del

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