Kolkata to Siliguri bus tickets

Attur (Salem) to Salem Krishnanagar to Raiganj Tindivanam to Rameshwaram Tindivanam to Salem Tindivanam to Trichy Villupuram to Chennai Villupuram to Perambalur Villupuram to Virudhunagar Pondicherry to Madurai Chennai to Bhavani Chennai to Karungal Chennai to Salem Chennai to Villupuram Madurai to Chennai Musiri to Chennai Tanjore to Hosur Kolkata to Asansol (West Bengal) Kolkata to Burdwan Kolkata to Siliguri vilupuram to Chennai vilupuram to Perambalur Pandoh to Delhi Behrampore to Siliguri Bangalore to Mumbai Bangalore to Vellore