The Popocatepetl volcano just east of Mexico City has spit out a cloud of ash and vapour 2 miles (3 kilometres) high over several days of eruptions.
Volcanic ash "is very abrasive for plane engines, and could result in very serious complications”.
A thick plume of ash from the erupting Puyehue volcano in the Andes shifted direction into Chile.
North-westerly winds pushed the giant column of ash from the Chilean volcano.
Iceland`s main airport will close from 1230 IST today until end of the day due to volcanic ash cloud.
Morocco closed several airports on Tuesday as the cloud of ash from a volcano in Iceland approached northwest Africa, the transport ministry said.
Iceland`s volcano has produced a 1,000-mile-wide ash cloud off the west coast of Ireland.
Britain and Ireland grounded flights again on Wednesday after a fresh cloud of ash swept in from the Icelandic volcano which sparked unprecedented air travel chaos in Europe last month.
Day in Pics: 25th October
Showbiz World - October 25, 2014
'Happy New Year' star cast perform in Washington