Aviation Why India’s airport development model badly needs an overhaul Updated : November 18, 2019 12:30 PM IST Delhi airport final project cost was 3.8 times the initial estimate and in the case of Mumbai it was 1.7 times the initial estimate. Despite a majority of passengers gravitating to low-cost flying, the infrastructure includes amenities which only a small percentage of the passengers demand. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.