Indigo Airlines has achieved significant profitability, reporting a six-fold increase in net profit to 787 crore despite industry challenges like high fuel prices and currency depreciation. With a strong focus on operational efficiency, on-time performance, and low-cost structure, it has outperformed competitors who are struggling with massive losses. The airline's success is attributed to strategic decisions including aircraft leaseback arrangements, maintaining a single aircraft model, and adherence to a low-cost business model.