i think like 10 years ago there were some charter flights from the US with 1 stop. I know bunch of people that go to Ibiza each year and yet they couldn't fill 1 plane in total. Though if Iberia did 1-2 non-stops a week in the summer it could be feasible. I don't see a direct flight really changing the # of US tourists - a direct flight barely saves time and wouldn't be notably cheaper IMO. Hence I don't see a direct flight really changing the # of US tourists coming.