In Mumbai, jet fuel prices have been increased to Rs 71,759.06 per kl from Rs 60,468.28 per kl, posting a hike of 18.67 per cent. In Chennai, the ATF price has registered a jump of 19.57 per cent at Rs 75,602.99 per kl from Rs 63,227.62. While in Kolkata, it has been increased to Rs 76,625.68 per kl from Rs 64,824.82, an increase of 18.20 per cent. This is the fourth straight hike in ATF prices since February last year. Jet fuel is a colourless, combustible, straight run petroleum distillate liquid.