The number of passengers flying from European airports declined by 13.5 percent in April compared to the same month last year.
This is according to figures from Airports Council International (ACI) Europe, which blamed the fall on the disruption caused by the volcanic ash cloud.
It wasn’t all bad news however, as Istanbul recorded a growth of 2.6 percent, while Moscow Domodedovo, Antalya and Brindisi posted positive figures of 25 percent, 10.2 percent and 26.5 percent respectively.
Olivier Jankovec, ACI Europe’s director general, said the ash cloud had "completely undone" the recovery in passenger numbers that had been ongoing since December.
"In that context, the German chancellor’s latest proposal to tax departing air passengers is not only adding insult to injury, but it is also totally illogical," he commented.
During the first three months of this year, passenger traffic at European airports increased 5.2 percent compared to the same period in 2009.