The journey from Manjeri to Mumbai covers 1300 km. The most efficient way is to fly from Calicut International Airport. Alternatively, you can take a long-distance train from Shoranur Junction, which takes about 24-30 hours. Mumbai is well-connected by both rail and air from the Malabar region.
Total Distance: 1300 km driving distance, 1100 km straight-line air distance.
The Konkan Railway route is incredibly scenic; try to travel during the day.
November to February, when the weather in Mumbai is cool and dry.