How Full Is My Flight? 4 Simple Ways to Check | Condé Nast Traveler
"HappyOrNot's global feedback from more than 9 million travelers indicates Sundays are among the most crowded and stressful days to fly, while departures at 4 a.m. and between 7 a.m. and 8 a.m. have the fewest passengers and the highest traveler-satisfaction rate (84.8%); their recommendation is to fly earlier in the day and avoid Sunday departures to minimize stress." - Jessica Puckett