Driving Time Before / After Border Processing
A current private-transfer service lists Dubai→Sohar at roughly 222 km and 2 hours 40 minutes of driving, while a current Dubai→Oman bus operator gives approximately 280 km and 3–3.5 hours to Sohar via its chosen border route. For a private group bus, add hotel/site loading, immigration, border checks and final Sohar traffic.
The published distance difference is a good reason not to promise a fixed kilometre figure until we have the exact pickup/drop pins and border route.
