The net profit of InterGlobe Aviation, parent of low-cost airline IndiGo, crashed 75% year-on-year to `191 crore for the third quarter due to sharply higher jet fuel prices, lease rentals and other costs. Although revenue from operations jumped 28.1% y-o-y to `7,916 crore, the operating margin or the EBITDAR (earnings before interest, tax, depreciation, amortisation and rentals) was down 11.2 bps y-o-y to 20.1%. In the last three months, the IndiGo stock gained 38% and closed the Wednesday's session at `1,107.95 apiece, down by 0.89%, on the BSE. The airline's revenue received a boost from better volumes \u2014 it carried 22.5% more domestic passengers in the December 2018 quarter \u2014 and better yields. The per passenger revenue stood at `3.83\/km in Q3FY19, up 3.7% y-o-y. According to analysts, the average fare during the quarter was up 6.3% y-o-y. IndiGo's fuel cost jumped 69.2% y-o-y to `3,410.4 crore in the quarter under review. Other expenses surged 32% from the year ago to `2,140.9 crore. Expenses on account of lease rentals were up 45.7% to `1,376 crore. READ ALSO |\u00a0Modi\u2019s direct tax overhaul at work: Relief for taxpayer, small businesses on cards as election looms According to Indian Oil Corporation, the average aviation turbine fuel (ATF) price was `72,900\/kl during the October-December period, compared with `54,900\/kl a year ago, up 33%. The value of rupee depreciated around 9% y-o-y. Costs such as lease rentals, repairs and maintenance are dollar denominated in the airlines business. With an enviable market share of 43% at the end of December 2018, the budget carrier has been adding capacity at a fast clip. The available seat kilometres (ASKs) are 21.6 billion, up 32.9% y-o-y. It inducted 19 aircraft during Q3FY19, taking the size of its fleet past 200. The domestic market capacity excluding IndiGo has increased by around 10% y-o-y so far. IndiGo posted its first-ever loss of `652 crore, post listing, in the second quarter. IndiGo\u2019s Q1FY19 profit had plunged 97% y-o-y to `28 crore.