The journey from Manali to Nashik covers about 1800 km. The most practical way is to take a bus to Delhi and then a train or flight to Nashik. Expect a total travel time of 40 to 45 hours by train.
Total Distance: 1800 km by road, 1500 km air distance.
Take the Punjab Mail from Delhi for a direct train connection to Nashik.
October to March for pleasant weather.