ATCF

An acronym, short for "As The Crow Flies", or the shortest distance from point A to point B.

I fucking hate Austin's traffic. My drive to work is an hour long, despite being only 4 miles away ATCF.

ATCF

As The Crow Flies - the straight line (/ great circle) distance between two points, as opposed to the longer distance required to drive between them if you prefer staying on asphalt.

It's only 11 miles ATCF but since the bridge is out it's a 70 mile drive.