Amid persisting concerns in certain quarters about leasing out of six airports, the government on Wednesday told the Rajya Sabha that Per Passenger Fee (PPF) was the bidding parameter and based on the PPF offered by the winning bidder for these aerodromes, AAI will earn Rs 904 crore profit in 2020-21. Recently, the Airports Authority of India (AAI) awarded six airports Ahmedabad, Jaipur, Lucknow, Guwahati, Thiruvananthapuram and Mangaluru for operations, management and development under Public Private Partnership (PPP) for 50 years. Adani Group has won the bids for the six airports. The per passenger fee was the bidding parameter. It was estimated that on the basis of the PPF offered by the winning bidder for six airports, AAI will earn a profit of Rs 904 crore for the year 2020-21 as against estimated profit of Rs 530 crore had it been operated by AAI itself, Minister of State for Civil Aviation Hardeep Singh Puri said in a written reply.