The Sealdah Haldibari Darjeeling Sf Mail train covers a total distance of 629 kilometers. The average speed of the Sealdah Haldibari Darjeeling Sf Mail train is 52.83 Kmph. (12343) The Sealdah Haldibari Darjeeling Sf Mail train also has return services with train No. 12344 which departs from HDB at 18:15 hours and arrives SDAH at 06:00 hours.