dont go kathmandu from flight because nepali immigration officers are crazy. kina risk linu huncha usa to delhi ko flight linu. stamping delhi ma huncha then according to time get a ticket from delhi to bagdogara close to silguri then from there u can go nepal in bus ,car anything or you can call your family there to pick you up . or hire a cab n go biratnagar airport if you are going kathmandu thats all ..