As the crow flies and By the shortest route

As the crow flies adverb - By the shortest and most direct route.

By the shortest route and as the crow flies are semantically related. In some cases you can use "By the shortest route" instead an adverb phrase "As the crow flies".

As the crow flies and by the shortest route are semantically related. You can use "As the crow flies" instead an adverb phrase "By the shortest route".