New Delhi/IBNS, Dec. 8 -- More than 450 IndiGo flights were cancelled on Monday as the airline continued efforts to stabilise operations after nearly a week of severe disruption, according to media reports.

Though Monday's numbers remain high, cancellations have declined from the 650 flights cancelled on Sunday and the over 1,000 cancellations reported a few days earlier.

IndiGo, known for its punctuality and scale, admitted that it failed to adequately prepare for the rollout of the revised Flight Duty Time Limitation (FDTL) norms for pilots, which came into force on November 1.

The new rules impose stricter limits on night flying hours and mandatory weekly rest, forcing airlines to overhaul crew rosters. IndiGo's inability to realign...