A flight from Varanasi to Mumbai was delayed by 3.5 hours due to the pilot calling in sick. The airline, IndiGo, sent a replacement pilot to operate the flight.

The delay was a result of the original pilot's unavailability, and the airline took steps to find a replacement.

Further details about the incident are available from the source, Moneycontrol.com, which reported on the delay and the airline's response to the situation.