The largest airline in India, low-cost carrier IndiGo Airlines (6E) flies to more than 35 destinations within India, as well as five international destinations in Nepal, Oman, Singapore, Thailand and the United Arab Emirates. The airline, which was founded in 2006, has primary hubs at Delhi's Indira Gandhi International Airport (DEL) and Andhra Pradesh's Visakhapatnam International Airport (VTZ). Secondary hubs are located at Mumbai's Chhatrapati Shivaji International Airport (BOM) and Kolkata's Netaji Subhash Chandra Bose International Airport (CCU). The airline's fleet is configured with only Economy Class seating.