Physics question... maybe? Air Travel, Earth Rotation...

Maybe Im crazy and missing something, so help me out friends.

A friend of mine said he took a 20 hour flight from NY to South Africa. Well it got me thinking about air travel and the Earths rotation. If you could float above the Earth and remain stationary, the Earth would begin to fly beneath you and you could travel in theory all the way around the world in 24 hours, right?? By that ration how the hell could a flight take 20 hours assuming the plane is moving? Unless of course you are flying against the earth’s rotation, but why would an airline do that?

So whats up, clear me up on this please. And if anyone knows do airlines send planes in the directions that may be a longer route mile-wise but faster because of the rotation of Earth???

Thanks…

Post Here:

http://boards.straightdope.com/sdmb/showthread.php?threadid=61487

I double posted. Phone rang and broke my connection as I was posting, sorry…