Devices powered by lithium-ion batteries—including cell phones, laptops, vape pens and portable chargers—cause smoke or fire on U.S. flights several times per month.

Early Sunday, a United Airlines flight from San Francisco to Sydney was forced to divert to Honolulu after the crew declared an in-flight emergency over the Pacific Ocean. Flight UA863, a Boeing ...

The CEO of United Airlines is trying to reassure travelers that the airline is safe despite a series of recent incidents ranging from a panel falling off a plane to an engine fire.