To get from Dubai to Mecca (Medina, Er Riyadh, Jeddah) by bus you need to find the transport company SAPTCO.

Company coordinates:

Shop #10,Bin Rasheed Building,Al Khaleej Road - 62 2nd St - Frij - Al Murar - Dubai - UAE

On Google Maps:

https://maps.app.goo.gl/eyQ2NLDXJWwNSYKY8

Owner's phone/Whatsapp: +97142710620

Attention! To visit the Kingdom of Saudi Arabia you need to obtain a visa!

Have a nice trip!