The document summarizes the key differences between low cost carriers (LCCs) like Indigo Airlines and full service airlines (FSAs). It notes that LCCs operate point-to-point flights from secondary airports, use a single fleet type, offer single-class cabins with reduced seat pitch, restrict baggage and have minimal in-flight services. This allows LCCs to reduce costs related to airport charges, maintenance, training, turnaround times and distribution. The document then discusses how Indigo Airlines was able to become highly profitable despite the industry's losses by increasing fleet capacity and passenger traffic while others declined. Indigo maintains high customer ratings through consistent, quality service and strong operational and financial performance.