The Hayli Gubbi volcano in Ethiopia's Afar region erupted on Sunday for the first time in recorded history, sending ash plumes up to 14 km (8.7 miles) into the sky, seismologists said.
The ash from the volcanic eruption covered parts of Pakistan and northern India, after crossing Yemen and Oman, according to tracking website Flightradar24, and was moving towards China.
This forced Air India and Akasa Air to cancel some flights as a precaution.
The India Meteorological Department said earlier it was expected to clear Indian skies by 2:00 p.m. GMT.
Air India cancels 11 flights because of volcanic ash
Air India said it had canceled 11 flights on Monday and Tuesday to make precautionary checks on aircraft that had flown over some locations after the eruption, following a directive to airlines from India's aviation regulator.
Smaller peer Akasa said it had scrapped scheduled flights to Middle East destinations such as Jeddah, Kuwait, and Abu Dhabi scheduled during the two days.
India's Ministry of Civil Aviation said that only a few flights had been rerouted as a precautionary measure and that the airport authority had issued a notice to all affected planes.
Ethiopia has about 50 active volcanoes, Atalay Ayele, a seismologist and researcher at the Institute of Geophysics, Space Science and Astronomy at Addis Ababa University, told Reuters.
"At any time, these volcanoes can be active or can show manifestations of activity," he said.