A person takes ill on a flight, what happens first?
OK, so let's start from the beginning: what does the crew do if a passenger becomes sick or appears to be dying mid-air? Simple, said one pilot: "We ask if there are any medical professionals on board. And if the guy is, indeed, in the process of dying, we divert and try to save him."
Where the plane is diverted, obviously, depends on where it was headed. "If it’s a domestic flight, we'll divert to the nearest airport and try to get him or her medical attention. If it's an international flight, however, we try to work on them until we can get close to a US airport. There's less paperwork to declare if we're in the United States.”
But what if there's no saving him?
Just to clarify: nobody technically "dies" on a plane. For legal reasons, the flight crew can't declare a person dead, and the airlines take serious issue with doctors on board doing so as well. Blame the lawyers for that one. But if the person really is dead, the flight must go on, and it's up to the crew to determine where to put the body.