Airlines face disruption and flight cancellations today due to a four-hour strike by air traffic controllers in Italy.
The walkout is planned between 12 noon and 4pm UK time, forcing some flights to be cancelled.
Eurocontrol reported that airspace over Milan, Rome and Brindisi would be affected.
British Airways said: “We have proactively re-timed some services to avoid the four-hour strike period, but regrettably we have been forced to cancel a small number of flights.
“We will be using larger aircraft where possible to re-accommodate customers whose original flights have been cancelled as a result of the strikes.
EasyJet warned: “Every airline flying to and from Italy, as well as those flying within Italian airspace, will be affected.
“We are doing everything possible to minimise the impact to our customers and are working through our plans which we will communicate as soon as we can.
“If we are forced to cancel any flights, our customers will be informed by SMS and email, with up to date information on the situation available on easyJet,com.”