For the second time this month, state-owned oil firms today hiked jet fuel prices, this time by 2.4 per cent following a spurt in international oil rates.Aviation Turbine Fuel prices in Delhi will be increased by 948 rupees per kilolitre to 40,423 rupees per kilo litre effective from midnight tonight. ATF rates in Mumbai, will go up by 988 rupees to 41,710 rupees per kilo litre. After two hikes, the ATF prices are now above the September levelsIOC, Bharat Petroleum and Hindustan Petroleum had for three consecutive fortnights reduced ATF rates mostly because international oil prices had eased and rupee strengthened against the US dollar.