# Since Earth spins, would an aircraft travelling opposite to direction of Earth spin take less time? [duplicate]

Suppose we want to reach the point on earth which in relative terms is exactly on the opposite end of the sphere we call earth (I know it is not an exact sphere).

We either dig vertically downwards, pass through the center of the earth and come out on the other end as it happens in the cartoon. But taking a more pragmatic approach means using air travel.

If we face North, we could either go East or West to get to the directly opposite point on earth which means traveling a distance of half the circumference of earth.

Now here is my question, since the earth is spinning, does it mean that if we fly in direction opposite to which the earth spins, we shall reach the other end quicker? why or why not?

If this is the case, the the opposite is true also i.e it will take longer for us to reach the other end if we travel in the direction of earth spin. Is this taken into consideration in actual flight routes?

## marked as duplicate by Floris, Kyle Kanos, ACuriousMind♦, John Rennie, JimMar 30 '15 at 14:21

• Possible duplicates: physics.stackexchange.com/q/16390/2451 and links therein. – Qmechanic Mar 30 '15 at 0:17
• When I hear "why or why not" my homework-detector goes off. Regardless, if you can fly above the atmosphere and fly west toward that point, you will get to it sooner because it is moving east. Of course, if it's on the equator, you could simply get above the atmosphere and wait 12 hours, and it will come to you (though that means you are traveling west with respect to the earth at about 1000 mph). Anyway, if you're flying in air, which is basically attached to the earth, the spin of the earth makes no difference. It's just a matter of wind. – Mike Dunlavey Mar 30 '15 at 14:05
• This is not my homework but something I have wondered about for some time. You said that " if you're flying in air, which is basically attached to the earth". I thought that was not the case. Assuming that wind stops and we throw a balloon into the air, won't it stay stationary while the earth below it rotates? – quantum231 Mar 30 '15 at 23:03