Delta passenger flies from the Caribbean to the U.S. Then a bathroom dispute with her seatmate spirals—until she’s threatened with the no-fly list

Personal space on flights is scarce. More often than not, a stranger will encroach on it somehow, even if they don’t mean to.

After all, the average economy plane seat can nowadays be as narrow as 16.5 inches, while legroom averages around 35 inches. Experts say air travelers have lost 2 to 5 inches of legroom and 2 inches of seat width since the 1980s.