An official at San Francisco International Airport says lightning hit a United Airlines flight, forcing the plane to return to the airport.
Duty Manager John Ginty says the plane landed safely Thursday night and there were no injuries to anyone on the jet.
United spokeswoman Megan McCarthy says the Boeing 777 carrying 258 passengers was en route to London.
She says the plane landed about 9 p.m., shortly after it had taken off.
Maintenance workers were inspecting the aircraft.
McCarthy says the passengers will fly to London Friday.