Get affordable fares for Patna to Gangtok taxi at Bookcab that starts from Rs 15046. Tariff per km ranges from INR 12.75 and 15.5. Total cost is clearly broken down into respective charges and no charges under the hood. 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 taxi fares across India through Bookcab. Our Taxi Fare Calculator provides you with estimated cab fare between Patna and Gangtok. Estimated distance from Patna to Gangtok is 581 km. Estimated travel duration is 9 hours 16 mins.