New Delhi, Dec. 4 -- IndiGo, one of the country's leading airlines, has been hit by operational disruptions, causing at least 150 flight cancellations, while several others were delayed, affecting thousands of fliers. Several videos surfaced showing scores of passengers waiting for hours to board flights. The chaos, which continued today, has also affected major cities such as Delhi, Bengaluru, Kolkata, and Hyderabad.

The situation has resulted in mounting frustration among passengers, many of whom have been left stranded at airports, claiming that there was no prior notice of changes to their travel plans.

The delays have left passengers anxious. If you are among the passengers who will be boarding a flight, here's a complete step-by-s...