Four passengers were hospitalized after smoke filled the cabin of a Delta Air Lines transatlantic flight, forcing the aircraft to make an emergency landing in Portugal on Saturday, September 26.
The incident occurred aboard an Airbus A330 carrying 286 customers from Barcelona, Spain, to Boston in the United States. British newspaper The Sun reported that 14 people on board suffered from smoke exposure and required medical assistance.

During the flight, an onboard alarm sounded as smoke began spreading through the passenger cabin. Travelers were forced to put on emergency oxygen masks while the flight crew diverted the aircraft toward Portugal.
The jetliner landed safely in the city of Porto. All 286 passengers were evacuated from the aircraft and subsequently transferred to another flight to continue their journey.
Medical response and aviation background
In total, 14 people received medical care following the landing, with four passengers requiring hospitalization. Authorities have not specified the cause of the carbon monoxide and smoke, and an investigation into the incident has been launched.
Delta Air Lines is a major United States carrier headquartered in Atlanta, Georgia, operating regular international routes between Europe and North America. The Airbus A330 is a wide-body passenger jetliner designed for long-haul oceanic travel.
Barcelona, located in northeastern Spain, and Boston, Massachusetts, are major coastal transport hubs for transatlantic travel. Porto is the second largest city in Portugal, situated along the Atlantic coast with an international airport equipped for emergency diversions.
Carbon monoxide is a toxic gas that can cause severe respiratory distress and hypoxia, making cabin air contamination a major safety concern for flight crews operating pressurized aircraft.
Previous incidents and aircraft safety
The diversion follows an earlier aviation incident where a Lufthansa flight made an emergency landing due to a power bank catching fire in the cabin. That aircraft was travelling from Frankfurt am Main in Germany to Lisbon in Portugal.
Lufthansa is the flag carrier of Germany, based at Frankfurt Airport, one of Europe's largest aviation hubs. Portable power banks containing lithium batteries have faced increasing safety restrictions from international flight regulators due to fire risks during flights.
