Just read about this EU passengers' rights site, for both EU and non-EU travelers.
https://europa.eu/youreurope/c…r-rights/air/index_en.htm
After enduring a 3-hr delay that turned a 6-hr flight segment into a 9-hr segment, resulting in a 22-hr day, I wonder if USpassengers have any remaining protections, or if this have all been de-regulated out of existence?