Why is IndiGo called 6E?

The “6E” in IndiGo flights represents the airline’s unique identity. The “6” is part of IndiGo’s IATA code, assigned by the International Air Transport Association. The “E” signifies IndiGo’s brand, representing “Efficient” and “Economical”. Together, “6E” is a distinctive and recognizable code that helps passengers identify IndiGo flights. This code is used for ticket booking and appears on boarding passes, making it a significant branding tool in the aviation industry​