"But we are concerned that it will go from one hand to the other. The revenue shortfall from one will be somehow offset by the other by increasing airline charges somewhere else. So we will have to make sure that does not happen."
Tyler said the high airport costs were impacting domestic air traffic which had declined in the recent past.
"The Indian airport costs, let us not kid ourselves, remain a big problem. .... Domestic traffic has been in decline recently. High airport costs have to have something to do with it," he said.
Though this was not the only reason for a declining air traffic, "if you put the cost of operating for the airlines it is going to reduce the amount of operations they are going to do. They are not going to be able to put fares in the market that will keep people flying," the IATA chief said.