I am trying to remember the name of a 1980's science fiction book where the protagonist is a guy who is enslaved on a large plantation-like region of a planet. He escapes via a spaceport/airport for Jetsons-reminiscent aircraft either to another planetary region, or even off-planet.
Eventually, after becoming a galactic citizen, he returns and either fights to free his former peers, or maybe goes through political machinations to effect change on a global scale (memory's a little foggy on this). I'm not thinking of Heinlein's Citizen of the Galaxy, although it is not entirely dissimilar. The storyline is similar to but more family friendly than Piers Anthony's Bio of a Space Tyrant.
Another point of memory is a cover with the guy and a flying vehicle with a glass/plastic dome, sort of like the Jetson's, but more realistic looking.