flight path

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The precise route taken or due to be taken through the air by an aircraft or spacecraft.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun The traveled path of a projectile, rocket or aircraft through the air.
• noun A predefined route of travel for an aircraft or spacecraft.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun the path of a rocket or projectile or aircraft through the air
• noun a designated route followed by airplanes in flying from one airport to another