In 2023, the busiest day for airlines was Friday August 11th, when airlines operated 18,586,233 seats. For context, the average daily capacity over the year was 16,582,222, making this peak summer day 12% busier than the average travel day. //

Conversely, the quietest day to travel by air is the third Saturday of the year, at least based on 2023's data. 13,967,001 seats operated on January 21st, making the day 16% less busy than the average for airline operators.