Cyberattack Disrupts Europe Boarding Systems

Tereza Pultarova, a journalist, spoke to BBC News from inside Heathrow, where she was due to fly to Amsterdam at 6:30 a.m. for a connecting flight to Cape Town.

"Unfortunately, the airline I'm with...they don't have a service desk here, so we've been left in the dark," she said. "It's been a great chaos, and it's been quite...frustrating for most people here," she said.

At Berlin Airport, Kim Reisen was struggling with delays and a lack of clarity, telling Reuters they had only been told there was "a technical fault."

Another traveller, Siegfried Schwarz, also from Berlin, said: "I ... find it inexplicable that, with today's technology, there's no way to defend yourself against something like that."

Easyjet Operating as Normal

EasyJet, among Europe's biggest airlines, said it was currently operating as normal and did not expect the issue to impact its flights for the rest of the day.

U.S. carrier Delta Air Lines said it expected minimal impact to flights departing from the three affected airports, adding it had implemented a workaround to minimise disruption.

There were no indications of threats to Polish airports, deputy prime minister and digital affairs minister Krzysztof Gawkowski said.

British transport minister Heidi Alexander said that she was receiving regular updates on the situation.