Depending on which district of Shenzhen you are starting from, Baoan and Luohu are far apart. Generally, at a speed of 100, if the road conditions are smooth, you can reach Guangzhou Huadu Airport in 2 hours from Shenzhen Baoan Airport to Guangzhou-Shenzhen Expressway. The toll should be 50 25 15. Take the Guangzhou-Shenzhen Expressway until you see the instructions of the &”;North Second Ring Road&”; exit, and then there are instructions all the way to the new Baiyun Airport in Huadu.