The calculated distance (air line) between Al Ḩillah and Al Fallūjah is approximately 71 miles respectively 115 kilometers.
By car or train, the actual journey to Al Fallūjah is certainly longer, as only the direct route (as the crow flies) between Al Ḩillah and Al Fallūjah has been calculated here.
Air line (approximately)
115 kilometers
62 nautical miles