New Delhi, Dec. 19 -- Both Air India and IndiGo, in an attempt to mitigate fog-related disruptions, such as reduced visibility that affects flight operations, issued travel advisories for passengers during the holiday season. The advisories requested passengers' patience as services returned to normal.

Air India, in its advisory on Friday, said it would remain vigilant and make every effort to mitigate fog-related disruptions. They said that they understand the importance of their passengers' travel plans, especially during this holiday season, and promised to work around the clock to minimise any inconvenience.

The airline said that as the weather department has forecasted dense fog conditions in Delhi and parts of northern and eastern...