The route from Khalsar to Patna involves a road transfer to Leh and a flight to Jay Prakash Narayan International Airport. You will typically transit through Delhi. The distance is over 1500 km. Patna is one of the oldest continuously inhabited places in the world.
Total Distance: Driving distance 1800 km, Air distance 1400 km.
Book flights in advance to get better rates.
October to March for pleasant weather.