A look at some of the disruptions affecting airlines and airports around the world:
Germany: Eurowings says it had to cancel German domestic flights as well as services to and from the U.K. on Friday. The budget subsidiary of Lufthansa said that its check-in and boarding processes were impaired by the computer disruption. The airline called on people traveling inside Germany to book a train ticket and submit it for reimbursement.
South Korea: Several low-cost airlines reported problems, triggering delays in passenger boardings at Incheon international Airport, the country’s biggest airport. Jeju Air Co. said it was experiencing problems with ticketing and other services on its website. Air Premia Inc. said key services on its website, such as ticket bookings, cancellations and online check-ins, were not working. The website of Eastar Jet Co. wasn’t accessible as of early Friday evening.
U.S.: United Airlines said the outage was impacting its computer systems and warned customers of potential flight delays. The carrier said some flights are resuming and it is issuing waivers to make it easier to change travel plans within its website.