An IT problem at Heathrow caused disruption on Saturday night, a spokeswoman for the airport said, after travellers reported flight delays.
Some IT systems failed at around 20:50, causing delays in handling baggage and problems with the online live arrivals and departures service, she added.
The spokeswoman said the issue was later resolved.
A number of people took to social media to complain of problems, with some reporting "huge delays" at the airport.
