IA on Friday took on rivals, Jet and Sahara, with a new super-apex fare slab on tickets bought 28 days (D-28) in advance. The pric-es matched Jets fares (FE, July 23). IA bettered the advance purchase date by two days. The super apex fares were for eight metro sectors: Delhi-Mum-bai (Rs 2,500), Delhi-Kolkata (Rs 3,000), Delhi-Hyderabad (Rs 3,000), Delhi-Bangalore (Rs 3,500), Delhi-Chennai (Rs 3,500), Kolkata-Mumbai (Rs 3,500), Kolkata-Banga-lore (Rs 3,500) and Chenn-ai-Kolkata (Rs 3,500). These D-28 fares are on one-way trips. The offer is valid till November 15 (the last date of travel).