IndiGo, India’s biggest airline, reported a bigger-than-expected net profit for the first quarter through June as travel demand grew and fuel costs declined.

Net income was 30.87 billion rupees ($374 million), compared with a 10.7 billion rupees loss in the same period a year earlier, parent InterGlobe Aviation Ltd. said in a stock exchange filing Wednesday. Analysts had forecast net income of 17.6 billion rupees, on average.

IndiGo’s market share in India has grown to about 63%, in part as it takes space left by insolvent Go Airlines India Ltd., which stopped flying in May. It carried 23.4 million passengers in the three months through June, up 12% from the quarter before, according to the aviation regulator.

Revenue rose 30% to 166.83 billion rupees from a year earlier. Total costs stood at 140.7 billion rupees, while fuel costs declined 13%.

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The carrier had a fleet of 316 aircraft as of June 30, it said in the filing.