Ralgha From United States of America, joined Nov 1999, 1614 posts, RR: 5
Reply 4, posted (14 years 2 weeks 2 days 6 hours ago) and read 28932 times:
If you're averaging only airports with commercial traffic, then the above posts are probably fairly accurate. However, if you are wondering what the true average is, it is much less. At a wild guess, I would say most runways are between 1 and 4 thousand feet long, which is less than a mile.