Vistara exploring newer avenues to supplement earnings; aims to have 70 planes by 2023: CEO With a ânimbleâ approach, Vistara is focussing on a leaner cost-structure as well as exploring newer avenues to supplement earnings, its CEO Leslie Thng has said and emphasised that full-service carriers are even more relevant in the current COVID scenario. The Delhi-based airline, which entered the domestic aviation space in January 2015, aims to have 70 planes in its fleet by 2023. In an e-mail interaction with PTI, Thng said that full service carriers look to be relevant more in the current scenario due to less density of seats in the cabins.