Private carrier Vistara today announced expansion of its network by entering the Delhi Chennai sector with two daily flights and a direct service between Chennai and Port Blair, from February 15 and March respectively. The Tatas and Singapore Airlines-promoted Vistara said these two flights increase its network to 22 cities and the bookings are already open on these new sectors. While the Delhi-Chennai operations will begin from February 15, the one between Chennai and Port Blair will be starting from March 1, the airline said in a statement. The airline is offering a one-way ticket in the Delhi-Chennai sector at Rs 3,099 and in the Chennai-Port Blair sector at Rs 3,699. Within three years of operations, Vistara has expanded to 22 cities offering over 700 weekly flights, operated by a fleet of 17 Airbus A320s. Since the launch full service, the airline has ferried more than 7 million customers.