From Patna taxi to Hajipur Junction (HJP), train to Raxual Junction (RXL), then drive to Kathmandu. 8 h 21 min $48. From Patna Junction (PNBE) train to Jaynagar (JYG), drive to Siraha, then Khoriya Deluxe to Gaushala. 16 h 36 min $24. From Patna drive to Kathmandu. 5 h 21 min $40.