Airline passengers are facing disruption across the UK after warnings of an ash cloud from a volcanic eruption in Iceland, BBC reported.
In Scotland, all airports are shut and there is disruption at many others including Manchester, Liverpool, Stansted, Newcastle and Birmingham.
The Air Traffic Control Service (Nats), imposed restrictions after the Met Office warned ash could damage engines.
Passengers are being advised to contact their airlines prior to travel.
Experts have warned that the tiny particles of rock, glass and sand contained in the ash cloud would be sufficient to jam aircraft engines.
Aberdeen, Edinburgh and Glasgow airports were shut as Nats said it was restricting flights "in accordance with international civil aviation policy".
The ash cloud disrupted all flights to and from Manchester with a similar picture at Newcastle airport where all arrivals were cancelled and all outbound flights either cancelled or subject to indefinite delay.