From Longman Dictionary of Contemporary Englishas the crow fliesas the crow fliesSTRAIGHTin a straight line ten miles from here as the crow flies → crow
Examples from the Corpus
as the crow flies• My house is ten miles from here as the crow flies.• The distance between the two towns is only 10 kilometres as the crow flies, but it can take up to 2 hours along the narrow coastal road.• The distance between Avonmouth, near Bristol, and Poole in Dorset is only 65 miles as the crow flies.• The course should be five and a half miles as the crow flies.• Similarly a stone's throw, as the crow flies, etc. 