New Delhi, May 16 -- The Supreme Court on Friday urged the Centre to take steps to "rationalise" airfares, pointing to the glaring disparity in ticket prices charged by different airlines for the same route on the same day, with economy class fares ranging from Rs.8,000 to Rs.18,000. A bench of justices Vikram Nath and Sandeep Mehta was hearing a public interest litigation (PIL) seeking regulatory guidelines to control unpredictable airfare fluctuations and additional charges imposed by private airlines during festive seasons, holidays and emergencies. During the hearing, solicitor general Tushar Mehta, appearing for the Directorate General of Civil Aviation (DGCA) and the Union government, informed the court that the Bharatiya Vayuyan Adhi...