Delta Air Lines (USA): Delta is the world’s most valuable airline, worth $26.31 billion. Headquartered in Atlanta, it operates flights across six continents. Passengers favor Delta for its reliability and smooth travel experience. (Image: Wikimedia Commons)

Indigo (India): India’s biggest airline and the second richest in the world, with a value of $23.79 billion. IndiGo follows a low-cost model, which helps it earn more. (Image: Wikimedia Commons)

Ryanair (Ireland): Based in Dublin, the airline flies to more than 200 places in Europe. It is worth $23,64 billion in 2025. (Image: Wikimedia Commons)

United Airlines (USA): It is the fourth richest airline in the world with a value of $21.52 billion. Based in Chicago, it connects major cities in the Americas, Europe, and Asia. (Image: Wikimedia Commons)

Air China: The airline is valued at $15.28 billion. It reportedly connects to important cities in Asia, Europe, and North America. (Image: Wikimedia Commons)

International Airlines Group – IAG (Spain): It is worth $14.09 billion. It own big airlines like British Airways, Iberia, Vueling, and Aer Lingus. (Image: Wikimedia Commons)

Southwest Airlines (USA): This is the largest low-cost airline in the world, valued at $14.66 billion. It is based in Dallas. (Image: Wikimedia Commons)