The United Airlines on Monday resumed flights from Newark, New Jersey to New Delhi after it had suspended flights over concerns about poor air quality in the capital.
UA Flight 82 had been cancelled on Friday and Saturday, data from flight-tracking website FlightRadar24 showed, while the airline's website said it had waiver policies in place for passengers travelling to, from or through Delhi until Monday.
Earlier on November 9, the airline company informed its passengers that travel disruptions were likely due to "air quality concerns" in Delhi. The carrier operates flights from Newark to Delhi and Mumbai.
Last week, Delhi declared a pollution emergency as toxic smog hung over the city for days, with tourism operators reporting cancellation of bookings for the Christmas holidays.