Route by final destination: Jeddah Islamic Port for the western region and national distribution, King Abdulaziz Port Dammam for the Eastern Province and Riyadh — with a rail option to Riyadh Dry Port for capital-bound containers. Sending Riyadh cargo to the wrong coast adds SAR 2,000+ of trucking.
Customs rules are identical at every port; what differs is congestion, free-time pressure and trucking availability.