The Airbus A320 is regarded as the most fuel-efficient commercial aircraft94 in its class and this is one edge Airbus doesn’t wish to cede to Boeing at any cost.95 So, IndiGo did not opt for Airbus A320 simply because they were getting a good bargain, but largely because it was the cheapest aircraft to fly. According to Airbus, ‘The A320 family is the world’s best-selling and most modern single aisle aircraft family. With proven reliability and extended servicing periods, the A320 family has the lowest operating costs of any single-aisle aircraft.’ A320 can also accommodate more seating
  
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