Estimated charge for Patna to Siwan car rental starts from INR 3928. Minimum rate per km ranges from INR 12.75 to 15.5. No hidden charges and transparent pricing policy at Bookcab. Clear breakup of extras. Book taxi from the Bookcab's wide range fleet of cars from BMW car hire to Swift Dzire Car hire with taxi fares available here. Find luxurious and affordable cars in our wide range fleet of cars and their fare details from Patna to Siwan. The approximate road distance from Patna to Siwan is 145 km. The approximate travel duration is 2 hours 36 mins.