Airport workers from the US, Germany, the Netherlands and Sweden spoke outside the airlines' summit in Dublin to highlight working conditions.
Speaking at the global airlines summit in Dublin on Thursday, the International Air Transport Association (Iata) vice-president for Europe, Rafael Schvartzman, described the strikes as one of the "biggest challenges we see in Europe".
That stable outlook, announced during a summit meeting of airline chiefs, masks a widening gap between regions, with only North America and South America set to improve, as well as worries that cargo traffic might be hurt as the economic crisis spills over from Europe.
The rise in oil after the weekend summit punished sectors like airlines and rewarded companies focused on energy.
Tyler meanwhile tried to contain the growing row between Gulf airlines and American carriers, telling the summit meeting in Miami that Iata was "not the battleground on which any resolution will be achieved".
"We strongly advise all people, both residents and tourists, to avoid the danger zone, and airlines to avoid flying near the volcano summit," agency chief Renato Solidum told a news conference.
Cameron outlined plans to strengthen "information sharing" between European Union member states on airline passengers in a paper he presented to EU leaders before their summit in Brussels at the weekend.
Travellers checked Good business; nice beaches ReprintsMr Djurisic, who called the summit, says that in the short run the four airlines must co-operate to cut costs.
The prime minister outlined plans to strengthen "information sharing" between European Union member states on airline passengers in a paper which he presented to EU leaders before their summit in Brussels at the weekend.
Doug Parker,chief executive of American Airlines, who is chairing the summit, tried to deflect the row, saying: "Our dispute is not with those three airlines.
