Several passengers were hospitalised after a Delta Air Lines flight was forced to make an emergency diversion due to smoke in the cabin. The incident occurred on flight DL251, which had departed Barcelona for Boston Logan International Airport.
The Airbus A330, carrying 296 passengers, was diverted to Porto in northern Portugal, where it made an emergency landing. Flight data showed the plane had left the Catalan capital at 3.15pm on Sunday, with a mechanical issue reported about two and a half hours after takeoff.
Passengers treated at Porto airport
A total of 14 passengers reportedly inhaled smoke, with eight treated on the ground at Francisco Sá Carneiro Airport in Porto. Three more passengers were taken to hospital, a spokesperson for Portugal's emergency and civil protection authority said.
The incident remains under investigation. Metro has contacted Delta for comment.
Similar incidents on other airlines
It is not the only time similar incidents have been recorded on planes. Last month, around five passengers suffered burns on an American Airlines flight from Atlanta to Dallas after a laptop battery fire in the cabin. A KLM Boeing 777 was also forced to turn around over the Atlantic Ocean after a charging power bank ignited at a business class seat.
The passenger, who was a former airline boss, had fallen asleep after breaking airline protocols forbidding any charging of power banks on board. Last year, the International Air Transport Association (IATA) launched a campaign to improve awareness of the danger of lithium-ion batteries onboard aircraft.
An average of 2.36 incidents relating to lithium-ion batteries happened on planes every week in 2025, a study by UL Standards and Engagement found. Some 12% of incidents led to a flight either diverting or performing an emergency landing, costing airlines millions of pounds, the organisation said.
