With all the airlines and aircraft that are in the sky at any given time, it seems impossible to fathom just how far they've all flown.
Ha, you didn't think that nobody bothered to figure that out, did you?
The new edition of the "Top 10 of Everything" has math and aviation geeks -- and the genuinely curious -- covered with a list of the top 10 airlines with the most miles flown. See the full list below.
Of course, all those airplanes have to land somewhere. Also check out the top 10 countries with the most airports.