Budget airlines easyJet and Wizz said they had completed software upgrades to their fleets of Airbus A320 planes over the weekend without any cancellations after a warning from the manufacturer on Friday that solar radiation could interfere with onboard computers.

More airlines around the world announced delayed or cancelled flights Saturday following an Airbus alert that up to 6,000 A320 aircraft may require upgrades. Its competitor, American Airlines, said it had already begun updating software following Friday's alert, and expected "the vast majority" of approximately 340 affected aircraft to be serviced by Saturday.

More airlines around the world announced delayed or cancelled flights Saturday following an Airbus alert that up to 6,000 A320 aircraft may require upgrades. Its competitor, American Airlines, said it had already begun updating software following Friday's alert, and expected "the vast majority" of approximately 340 affected aircraft to be serviced by Saturday.

Air passengers have been warned of potential travel disruptions following an Airbus alert on Friday that up to 6,000 operational A320 aircraft may require upgrades. "Airbus acknowledges these recommendations will lead to operational disruptions to passengers and customers," it said, apologising for the inconvenience.

Air passengers have been warned of potential travel disruptions following an Airbus alert on Friday that up to 6,000 operational A320 aircraft may require upgrades. "Airbus acknowledges these recommendations will lead to operational disruptions to passengers and customers," it said, apologising for the inconvenience.

Airbus has warned of potential travel disruption as it upgrades some 6,000 operational A320 aircraft, after an incident on a JetBlue flight last month.