The calculated distance (air line) between Ar Rāshidīyah and The Palm Jumeirah is approximately 18 miles respectively 28 kilometers.
By car or train, the actual journey to The Palm Jumeirah is certainly longer, as only the direct route (as the crow flies) between Ar Rāshidīyah and The Palm Jumeirah has been calculated here.
Air line (approximately)
28 kilometers
15 nautical miles