Continuing its market dominance, IndiGo flew 27.69 lakh passengers in May, accounting for more than a third of the total traffic. Last month, all Indian carriers together ferried a total of 71.27 lakh passengers. The privately-held IndiGo is one of the two domestic carriers making profit. The other profitable airline is GoAir.

Earlier this month, Sydney-based aviation think-tank 'Centre for Asia Pacific Aviation' (CAPA) said IndiGo is estimated to have recorded a profit of USD 150-175 million in fiscal 2015.

The low-cost model using a single type of narrow-body planes is one of the contributing factors for IndiGo's profitability. IndiGo was founded in 2006 by travel entrepreneur Rahul Bhatia and US Airways former chief executive Rakesh Gangwal.

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