Over 250 IndiGo flights were cancelled from Delhi and Bengaluru airports on Monday as the disruptions in the crisis-hit airline's flight operations entered the seventh day, sources told PTI.

In another development, aviation safety regulator DGCA in an order on Sunday late evening extended the time by Monday 6 pm for IndiGo CEO Pieter Elbers and Chief Operating Officer and Accountable Manager Isidro Porqueras to submit reply to its show cause notice over the ongoing disruptions in the airline's operations.