The airline said: “United Flight 1196 diverted to Memphis [Wednesday] afternoon after encountering a brief period of severe turbulence while the seatbelt sign was on.
“Paramedics met the aircraft at the gate and transported one passenger to the hospital.”
The extent of the injuries is not yet clear.
The ordeal comes after a recent spate of turbulence incidents.
Last month, crew members were smashed against the plane’s roof after an easyJet flight was rocked by severe turbulence and plunged 200m.
Daily Mail reported that 20 minutes after take-off, while cabin crew were preparing for the inflight meal service, the Airbus A320 was suddenly shaken by severe turbulence and unexpectedly dropped a couple of hundred metres.
Two crew members were injured after getting smashed against the ceiling, prompting the flight to divert to Rome.
On August 11, six flight attendants were reportedly injured when an EVA Air flight was rocked by strong turbulence.
Images of the aftermath posted on social media by passengers showed a scene of disarray, with food, beverages and meal trays scattered along the aisle.
On August 4, 10 passengers and four cabin crew members received minor injuries after severe turbulence struck a Korean Air flight.