Vistara is to start a daily flight connecting Delhi to Lucknow from May 18 and will operate twice a day on the route from June 16. Vistara, a joint venture domestic airline started by Tata Sons and Singapore Airlines, announced that from June 16 it will offer a daily return flight on the Delhi-Bengaluru-Mumbai sector. The start of the new services will see Vistara connect 10 cities including Delhi, Ahmedabad, Bengaluru, Bagdogra, Goa, Hyderabad, Lucknow, Pune and Mumbai.