New Delhi, Dec. 8 -- Hours after IndiGo CEO Pieter Elbers and COO Isidre Porqueras responded to a show-cause notice by the Directorate General of Civil Aviation (DGCA), the aviation watchdog released a statement providing details of the airline's response.

The DGCA, in its release, confirmed that it had received IndiGo's response to the notice issued over mass flight cancellations.

The aviation watchdog also stated that IndiGo had said that it was "profusely apologetic" for the mass cancellations and deeply regretted the inconvenience and hardship caused to customers.

The DGCA said that IndiGo had attributed the mass cancellations to the "compounding effect of multiple factors", which operated in an "unfortunate and unforeseeable confl...