How many people travel by air per day in u.s?
The National Air Traffic Controllers Association says that there
are, on average, between 25,000 and 30,000 passenger flights in the
US per day. (http://www.natca.org/mediacenter/bythenumbers.msp)
Let's estimate conservatively and pick 25,000 as our number.
Estimate that each airplane on average has 20 rows of people.
(Yeah, some planes are much, much bigger, but the majority of
planes are small.) Further guess that each row can hold 5 people on
average. Then make a guess that on average a flight is 75% full,
25,000 * 20 * 5 * 0.75 = 1,500,000 people per day
During burst periods (like Thanksgiving) the news is filled with
reports that the airline expect to well exceed 2 million people
each day, so 1.5 million on a normal day is probably not too bad a