The journey from Lalsot to Allahabad is about 650 km. You can take a bus to Jaipur and then a train to Allahabad. The route follows the NH 21 and NH 27. Expect a travel time of 12 to 14 hours. Allahabad is famous for the Sangam.
Total Distance: 650 km by road, 580 km air distance.
Overnight trains are the best way.
October to March.