Europe's travel recovery stalled at the start of this month after a stronger performance in July, as quarantine rules and warnings over rising infection rates created uncertainty and deterred tourists from booking trips abroad.
In July, ticket numbers for cross-border air travel within Europe stood at 28 percent of 2019's levels, as Europeans began to travel again after months of lockdown.
But by the first week of August, volumes had fallen to 18 percent, according to data provided by travel analysis group ForwardKeys.