IndiGo Airlines is a low-cost carrier that operates 399 daily flights to 33 destinations in India and abroad. It uses a hub-and-spoke model and focuses on keeping costs low by not providing complimentary meals and concentrating operations on high traffic routes to limit investments. A key to IndiGo's success has been strategic aircraft deals, including a 2005 deal with Airbus for 100 planes at exceptional prices and with Airbus responsible for maintenance, as well as keeping planes airborne for 12 hours per day to maximize revenue through efficient turnaround times under 31 minutes.