Staff shortages have been blamed for the cancellation of hundreds of flights over the weekend and into the week. Budget airline easyJet has axed nearly 300 flights since Friday.
British Airways has cancelled 115 flights to or from Heathrow Airport on Monday, although the PA news agency understands that only five were last-minute cancellations caused by coronavirus-related staff shortages.
The total includes some flights axed due to last week's decision by the airline to reduce its schedule until the end of May to boost reliability, as well as routes suspended for several months because of the pandemic, such as those featuring several Asian destinations.