Passengers on Delta flight DL251 saw their trip from Barcelona to Boston cut short on Sunday when smoke filled the cabin mid-flight. The crew diverted the Airbus A330 to Porto, Portugal. Delta confirmed that a mechanical problem caused the smoke.
Emergency teams rushed to the tarmac as soon as the plane landed at Francisco Sá Carneiro Airport. Eight people needed medical help, and three were taken to hospital for further care. Portugal’s emergency and civil protection services confirmed the details in a call with Reuters. Official reports said 296 people were on board the Delta A330 when the emergency occurred, and some passengers used oxygen masks.
Flight data from Flightradar24 shows the plane left Barcelona at 15:15 local time and landed in Porto at 17:45. The Atlantic crossing never happened. Delta said the landing went smoothly, but smoke in the cabin prompted the crew to land. Portuguese emergency services told Reuters that smoke in the cabin led to the diversion, while Delta described the event as a mechanical issue.
The airline has not said exactly what went wrong with the plane. A routine long-haul flight turned tense within minutes, and medical teams were waiting before the plane reached the gate.
Most people on board got off safely. Still, the need for medical help on the runway and trips to hospital show how serious the situation became. Emergencies like this put pressure on airlines flying over the Atlantic, where landing options are limited in a crisis. The crew had to act quickly.
Delta’s crew diverted the flight and arranged medical help on the ground while keeping passengers informed. Even well-maintained planes can face sudden problems. The safe landing and prompt medical care show why strict safety rules matter. For travelers, this is a reminder that air travel is safe but leaves little room for error, and that preparation makes a difference.
