Acute shortage of pilots along with NOTAMs at some airports forced IndiGo to cancel around 130 flights for Friday, a source said.
The cancelled flights account for almost 10 per cent of the airline's operations, the source said.
The Gurugram-based budget carrier operates over 1,300 flights per day with a fleet of 210 planes.
"IndiGo has cancelled around 130 flights for Friday as it continues to face shortage of pilots," the source said.
A query sent to IndiGo spokesperson and also to its chief operating officer Wolfgang Prock-Shauer remained unanswered.
The budget carrier has been cancelling flights since last Saturday after rain and hailstorm hit the Delhi-NCR region last week.
On Thursday it did not operate as many as 70 flights, citing reasons like planned cancellations and partial closure of the Bengaluru airport due to the Air Show.
"As stated earlier, the anticipated cancellations are 30 flights per day. The operations will be completely normalised by the start of the summer schedule from March 31. Additionally, a NOTAM in Bangalore started effective today (February 14), which caused additional 40 flight cancellations, rescheduling for which had been completed a month back and passengers were informed and re-accomodated accordingly," the airline said in its earlier statement.
It had cancelled 49 flights on Wednesday as well.
"The cancellations on February 13 were caused by several factors like anticipated weather conditions on February 14 and NOTAMS at various airports. This resulted in extended duty times which then made it necessary to re-roster our crew and optimise our operations," it said in a statement on Wednesday.
Further, the airline said it has decided to curtail its schedule for the remaining period of this month by "approximately 30 flights a day".
"This is in order to stabilise its operation and adjust crew rosters due to the reasons mentioned above. Passengers are in the process of being informed and re-accommodated," the carrier had said.
A query sent to DGCA director general B S Bhullar on IndiGo's large-scale cancellations did not elicit any reply.