Wall Street analysts say the booming popularity of weight-loss drugs like Ozempic and Wegovy might bring unexpected savings to U.S. airlines, according to Bloomberg.
With more Americans losing weight, planes could get lighter, and lighter planes burn less fuel.
According to investment bank Jefferies, the top four U.S. airlines, American, Delta, United, and Southwest, could collectively save up to $580 million on jet fuel in 2026 thanks to slimmer passengers. Jet fuel is one of the airline industry’s biggest expenses.
Combined, those four carriers are expected to spend nearly $39 billion on fuel this year alone.
Jefferies analysts estimate that a 10% reduction in average passenger weight could result in a 1.5% drop in fuel costs and up to a 4% boost in earnings per share.
“A slimmer society = lower fuel consumption,” the firm wrote in a recent note to clients, according to CNBC.
Small Changes, Big Impact
Aircraft weight has always been a major focus for the airline industry. Even tiny changes can make a difference.
In the past, airlines have removed olives from salads, switched to lighter paper for in-flight magazines, and installed slimmer seats, all in the name of saving weight and cutting costs.
Jefferies highlighted that weight is one of the most important drivers of fuel efficiency.
When Boeing delivers a new aircraft, there’s a fixed “operating empty weight,” and everything else, from fuel to passengers and cargo, must fit within the maximum takeoff weight.
The lighter the load, the less fuel is needed.
Using a Boeing 737 Max 8 as an example, Jefferies explained how average passenger weight plays into total aircraft weight.
The plane has room for around 178 passengers. If each passenger weighs 180 pounds on average, that adds up to about 32,000 pounds.
A 10% drop in average weight would cut that by 3,200 pounds, roughly 2% of the plane’s maximum takeoff weight.
That might not sound like much, but across thousands of flights, it adds up.
Weight Loss Drugs Go Mainstream
Weight-loss medications have been around for years, but the new generation of GLP-1 drugs, including Novo Nordisk’s Ozempic and Wegovy, is seeing a huge spike in demand.
Originally approved for diabetes treatment, these drugs have proven effective at helping people shed serious weight.
Now that pill forms are hitting the market, analysts expect usage to rise even more.
Pills are easier for many people to stick with than self-injections.
“With the drug now available in pill form and obesity rates falling, broader usage could have further implications for waist lines,” Jefferies analysts wrote.
Data from Jefferies shows that U.S. adult obesity rates have been dropping over the past three years, while the number of adults using weight-loss drugs has doubled.
Earnings Boost Could Be Big
The financial impact varies from airline to airline, depending on how much they rely on fuel and how sensitive their earnings are to fuel price swings.
Jefferies estimates a 2% decline in passenger weight could result in a 4% increase in earnings per share across the major carriers.
The firm broke it down even further: Delta could see a 2.8% gain in EPS, United 3.5%, Southwest 4.2%, and American as much as 11.7%.
American stands to benefit the most due to its higher operating leverage to fuel costs.
A Weighty Obsession
Airlines have long obsessed over weight. Jefferies pointed out that in 2018, United Airlines switched its Hemisphere magazine to lighter paper stock, saving an ounce per copy.
That move alone was projected to save 170,000 gallons of fuel annually, worth about $290,000 at the time.
With airlines flying millions of passengers each year, a population that is even slightly lighter could result in enormous fuel savings, all without changing anything about operations, routes, or aircraft.
Not Included: Snack Sales
It’s worth noting that Jefferies’ estimate of up to $580 million in fuel savings doesn’t factor in possible declines in onboard food or snack purchases, which could be affected by appetite-suppressing side effects of weight-loss drugs.
That means the overall financial impact could shift in different ways, depending on consumer behavior.
Still, the bottom line is clear: weight loss drugs aren’t just changing waistlines, they might quietly transform how much it costs to fly.