United Airlines: Record Sales, Thinner Margins

United Airlines brought in $17.9 billion in third quarter 2026 revenue, up 17.4% from a year earlier, while flying capacity grew just 1.3%.

But it kept a smaller share of those sales as operating profit. In its third quarter results released yesterday, reported operating margin fell to 8.1% from 9.2%.

Fuel became much more expensive, and other costs rose too. Stronger revenue had to cover a more expensive operation. The question is whether United can turn those sales into better profitability, especially when its fourth quarter forecast assumes an even higher fuel price.

Airlines measure capacity in available seat miles. One seat offered for one mile of flying counts as one available seat mile, whether someone occupies it or not. Dividing revenue and operating costs by that same measure lets us compare what the airline earns with what it spends to provide that capacity.

For the three months ended September 30, 2026, compared with the same period in 2025:

These figures are in U.S. cents. The revenue measure includes passenger revenue, cargo and other operating revenue, so it measures more than ticket pricing. Changes in the mix of passengers and routes can affect it too.

United's revenue still exceeded its operating costs, and reported operating profit rose 3.6%. Yet costs took a larger share of revenue. That is how profit dollars can rise while the profit margin falls: the airline earns more operating profit overall but keeps less of each sales dollar. This comparison is before nonoperating items, such as interest, and income taxes.

United's fuel bill rose 61.6%, while the number of gallons it consumed increased just 0.8%. Its average fuel price was $3.90 per gallon, compared with $2.43 a year earlier. The much larger bill came mainly from paying more for fuel, rather than using much more of it.

That puts the revenue growth in perspective. Higher fares can help cover costs, but the benefit can be absorbed by the cost of operating those flights.

The pressure extended beyond fuel. United's adjusted operating cost per available seat mile excluding fuel rose 7.8%. This measure also excludes profit sharing, special charges or credits, and expenses from services provided to third parties. It helps us examine other cost pressures, provided we remember that several expenses have been left out.

United can try to cover higher costs through higher fares. Whether that works depends on customers continuing to book at those prices.

United's net income under generally accepted accounting principles, or GAAP, rose 8.5% to $1,029 million. Adjusted net income fell 8.4% to $833 million. Both figures are in U.S. dollars and compare the third quarter of 2026 with the same quarter a year earlier.

The difference comes from what is included. Reported results benefited from $215 million of operating special credits, compared with $73 million a year earlier. Aircraft sale and leaseback gains were a major component. A lower effective tax rate also helped reported net income.

In a sale and leaseback, an airline sells an aircraft and then leases it so it can keep using it. The sale can generate an accounting gain, while the airline takes on lease payments. That gain is a different source of earnings from carrying passengers profitably.

United removes specified items from its adjusted results. On that basis, operating profit fell 6.9%, and operating margin declined to 6.9% from 8.7%.

Reading both sets of results gives us a fuller picture. GAAP includes the effects of transactions that occurred. The adjusted figures help show how the business performed without the specified items.

In yesterday's outlook, management said it expects fourth quarter revenue to grow more than 20% from a year earlier. Its investor update forecast adjusted diluted earnings of $0.50 to $1.50 per share, using an average fuel price assumption of about $4.80 per gallon, above the third quarter's $3.90. Dollar figures are in U.S. dollars.

That assumption is based on the Gulf Coast jet fuel forward curve as of October 16, which reflects prices for future delivery. It is an input to the forecast, rather than a price United has already paid for the whole quarter.

Management also expects growth in unit costs excluding fuel to slow. That would ease some pressure, although slower growth does not necessarily mean falling costs.

If fuel prices ease while revenue per seat mile stays strong, United could keep more of each sales dollar. If fuel remains expensive and customers become less willing to accept higher fares, margins could stay under pressure. This quarter shows the strain, but it does not establish how long it will last.

The next results offer a practical way to test those possibilities. Compare the actual average fuel price with the $4.80 assumption. Look at revenue per seat mile alongside passenger occupancy to see whether stronger revenue is holding up as seats fill. Then compare adjusted operating margin with the same quarter a year earlier, as well as this quarter's 6.9%.

Those measures will tell us more about United's progress than another revenue record alone.