New Delhi, Dec. 4 -- At least 150 IndiGo flights were cancelled, while several others faced delays and disruptions on Wednesday after the low-cost carrier experienced one of its most severe operational breakdowns in recent times. The turbulence - largely triggered by a crew shortage - continued into Thursday morning, with many passengers venting their frustration on social media.

A social media user who goes by the name Shubham Sharma recorded the chaotic scenes at Pune airport, showing passengers desperately waiting for their flights. "My Indigo Flight from Pune to Delhi is delayed by more than 3.5 hours. There are many flyers who have been waiting at the airport for more than 12 hours," he wrote.

Sanjay Kalirona, CEO of Gizmoreindia, ...