Approximately 1/8 mile (660 feet).

And, behold, two of them went that same day to a village called Emmaus, which was from Jerusalem about threescore FURLONGS. And they talked together of all these things which had happened. ( Luke 24:13-14 )

Source: A King James Dictionary. (Used with permission. Copyright © Philip P. Kapusta)

Bibliography Information

"Entry for 'Furlong'". A King James Dictionary.