Heathrow is amongst a number of European airports hit by a cyber-attack affecting an digital check-in and baggage system.
The airport warned of potential delays resulting from a “technical subject” affecting software program supplied by Collins Aerospace to a number of airways.
Brussels Airport stated a cyber-attack on Friday evening meant passengers had been being checked in and boarded manually, whereas Berlin’s Brandenburg Airport additionally reported longer ready instances as a result of downside.
RTX, which owns Collins Aerospace, stated it was “conscious of a cyber-related disruption” to its system in “choose airports” and that it was working to resolve the difficulty as shortly as potential.
The corporate added: “The impression is restricted to digital buyer check-in and baggage drop and will be mitigated with guide check-in operations.”
Heathrow stated extra workers had been available in check-in areas to assist minimise disruption.
It added: “We advise passengers to verify their flight standing with their airline earlier than travelling to the airport and arrive no sooner than three hours earlier than a protracted haul flight or two hours for a home flight.”
Brussels stated there could be a “giant impression on the flight schedule”, together with cancellations and delays.
Europe’s mixed aviation security organisation, Eurocontrol, stated airline operators had been requested to cancel half their flight schedules to and from the airport between 04:00 and 12:00 GMT as a result of disruption.
It stated “comparable points” had been affecting Heathrow and Berlin, and that “measures could also be required”.
There have been practically 100 delays out and in of Heathrow as of 10:00 BST on Saturday, in keeping with tracker FlightAware, whereas there have been practically 70 delays in Brussels and 15 in Berlin.