MAp Group said on Friday that passenger numbers grew on all of its three Australian and European airports in May as normal operations resumed in the aftermath of the volcanic cloud that covered much of Europe in April.

The company said that passenger traffic in Sydney Airport jumped by nine percent, with domestic use increasing by 11 percent while international travellers increased by 4.5 percent.

It also reported that Copenhagen Airport saw passenger numbers improving by 11.9 percent due largely to growing SAS Asian routes and solid domestic passenger influx while its Brussels terminal experienced passenger growth by 1.9 percent.

MAp chief executive Kerrie Mather said passenger traffic increased in the company's entire portfolio as the European operations recovered from the effects of the volcanic ash cloud in April.

Ms Mather added that the capacity improvements were also spurred by China Southern adding more flights between Sydney and Guangzhou and Qantas flying more often to Perth and Johannesburg.

She said that the company's Copenhagen terminal has become the Scandinavian hub with Egypt Air servicing direct flights en route to Cairo and Delta Airlines inaugurating its initial direct service from the city to New York's JFK Airport.