New Delhi, Feb. 17 -- India's largest airline, IndiGo, has sought approval to operate at least 275 additional daily flights, about a 15% increase over its current 1,900-odd departures, during the summer schedule from April to October, according to a presentation made to the Directorate General of Civil Aviation (DGCA).

If approved, the airline would operate around 2,175 daily flights-about 8% higher than the 2,022 flights it flew last summer.

This assumes significance as the revised target is roughly 15% lower than its earlier ambition of scaling up to 2,550 daily departures, reflecting a more cautious approach amid pilot hiring requirements and stricter flight duty time limitation (FDTL) norms.

In its submission to the DGCA, IndiGo in...