The upper classes are the only ones that can afford to travel in the USA. And they look down on everyone else as uncultured swine for not doing so.
I never got on a plane until I was in college and my college paid for it. My first trip abroad to Germany was $5000, and the college paid for $5000 of it. I spent paid the other $1000 and incidentals and it wiped out two entire summers of employment worth of savings.
Most people in the USA are poor. The median wage is 60K for a family w two working adults. To travel w/ a family you have to be making closer to 250K/yr.
You just only meet rich americans. You think a plane ticket for $1000 is cheap... wow.