Lucknow, Jan. 29 -- Ahead of Mauni Amavasya and other auspicious bathing days for the Mahakumbh Mela, airfares to Prayagraj from major cities have skyrocketed. While the ticket costs for Delhi to Prayagraj flights have soared to Rs 20,000 or more from Rs 5,000, one seeking to fly in from Mumbai must shell out anywhere between Rs 20,000 and Rs 56,000....