Aviation Turbine Fuel (ATF) prices are being hiked by 299 rupees per kilo litre from midnight tonight.Now it will cost 42,235 rupees per kilo-litre in Delhi and 43,553 rupees per kilo litre in Mumbai. State-owned oil firms have hiked jet fuel prices marginally by less than 1 per cent, in sync with a rise in global rates. The hike comes on the back of a near 3 per cent increase in rates effected on October 16.