Watch The Jetsons Meet the Flintstones (1987) HD Full Movie Free on SolarMovie. Watch The Jetsons Meet the Flintstones (1987) online free. Elroy Jetson invents a time machine that takes his family back to prehistoric times, where they meet...Elroy Jetson invents a time machine that takes his family back to prehistoric times, where they meet the Flintstone family.