1. as the crow flies - Adverb
2. as the crow flies - Phrase
by the shortest and most direct route
Source: WordNetit's 10 miles as the crow flies Source: Internet
A computer program uses the postal codes of the target address and the branches to list the closest branches in order of distance as the crow flies (or, if used in conjunction with streetmap software, road distance). Source: Internet
Distances to other cities These distances are as the crow flies and therefore not represent actual overland distances. Source: Internet
Relations between p -norms The grid distance or rectilinear distance (sometimes called the "Manhattan distance") between two points is never shorter than the length of the line segment between them (the Euclidean or "as the crow flies" distance). Source: Internet
‘By the time we reached Roman Road, only half a mile as the crow flies from our starting point, the bus was jam-packed full and sailing past the waiting queues.’ Source: Internet
Here, I’ve shown Maps calculating distance as the crow flies (pink) versus a calculated route (blue). Source: Internet