There is no direct connection from Mumbai to Junnar. However, you can take the bus to Pimpri-Chinchwad then take the taxi to Junnar. Alternatively, you can travel from Mumbai to Junnar in around 2 h 20 min.
How to get from Mumbai to Junnar
From Dadar bus to Pimpri-Chinchwad then taxi to Junnar. 4 h 45 min ₹1,596. From Mumbai taxi to Junnar. 2 h 20 min ₹3,441. From Mumbai drive to Junnar. 2 h 20 min ₹1,278. From Parel train to Asangaon then taxi to Junnar. 2 h 48 min ₹1,938.