Some of the 50 aircraft that will join the Vistara's fleet over the next three years will have just economy-class seats and the airline has factored in operational challenges that may arise from having planes with different class configurations, its CEO Leslie Thng said on Tuesday.

"Vistara is at a stage of maturing, which means it is growing in scale, size as well as in creating robust operational processes. We have factored in the operational challenges that may arise from having different fleets and are confident of successfully steering through them," the Vistara CEO told PTI.

Asked if the airline has decided the routes on which the all-economy aircraft would be deployed, Thng said, "No, we have not yet decided the specific routes, but those few aircraft will be deployed on routes that see weaker demand for front cabins (means business class and premium economy class) or on seasonal leisure routes. This only means offering the right product for the right market."

At present, there are 39 aircraft in Vistara's fleet comprising 19 A320neo aircraft, 13 A320ceo aircraft and seven Boeing B737-800NG aircraft.

One of the A320neo aircraft in its fleet currently is of all-economy configuration.

Rest of the A320neo aircraft as well as all A320ceo planes have three-class configuration -- business class, premium economy class and economy class.