Volcanic ash from Iceland continued to frustrate millions of passengers and the aviation industry as the skies were hit by yet another day of disruption.
According to Eurocontrol there were around 4,000 flights in the air on Sunday compared to 24,000 normally.
However, hope could be on the horizon, in Germany six airports in five cities opened temporarily to allow flights to and from the east.
German air traffic controllers announced a gap in the ash in an easterly direction that allowed a window of around three hours during which it was safe for planes to operate.
Southern Europe has been hit less hard with flights taking place in parts of Spain, Portugal and France, the southern Balkans, southern Italy, Bulgaria, Greece and Turkey.
However, in northern Europe the situation remains dire with airports empty, passengers stranded, and aircraft on the apron.