1. By the shortest and most direct route
   "it's 10 miles as the crow flies"

Encyclopedia: As the crow flies

• outerwear
• outface
• outfall
• outfield
• outfielder
• outfight
• outfit
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• outfitting
• outflank
• outflow
• outflowing
• outfox
• outgas
• outgeneral
• outgo
• outgoer
• outgoing
• outgrow
• outgrowth
• outguess
• outgun
• outhaul
• outhouse