Airlines to save big money on fuel as new weight-loss pills gain popularity, Wall Street says

Core Viewpoint - The introduction of GLP-1 weight-loss drugs in pill form is expected to benefit airlines by potentially lowering fuel costs, which are their largest expense, and enhancing earnings for the carriers [1][2]. Group 1: Impact of Weight Reduction on Airlines - A 10% reduction in average passenger weight could lead to approximately 2% total aircraft weight savings, resulting in up to 1.5% lower fuel costs and a potential 4% increase in earnings per share [2]. - Jefferies estimates that the four largest U.S. airlines—American Airlines, Delta Air Lines, United Airlines, and Southwest Airlines—will collectively consume about 16 billion gallons of fuel in 2026, with a combined fuel bill nearing $39 billion, representing nearly 19% of total operating expenses [4]. - A 1% reduction in aircraft weight is estimated to improve fuel efficiency by 0.75%, translating to a potential 4% increase in earnings per share across the group, with specific EPS gains projected as 2.8% for Delta, 3.5% for United, 4.2% for Southwest, and up to 11.7% for American [5]. Group 2: Weight and Fuel Efficiency - Weight is a critical factor influencing fuel efficiency, as emphasized by aircraft manufacturers like Boeing. The operating empty weight of an aircraft determines how much fuel, passengers, baggage, and cargo can be carried [6]. - For example, the Boeing 737 MAX 8 has an operating empty weight of about 99,000 pounds, with a maximum takeoff weight that allows for a specific distribution of fuel and payload [7]. - A 10% decline in average passenger weight could reduce total passenger weight by approximately 3,200 pounds, equating to about 2% of maximum takeoff weight, which would yield significant fuel savings over numerous flights [8].