UAL 10-K Analysis: Three Businesses, One Multiple — Why the Market Misprices United

United Airlines generated $59.1 billion in revenue in 2025 — the most in the company's history — yet its 7.6% return on invested capital barely cleared its 6.2% cost of debt. The gap between value creation and destruction: roughly 150 basis points. One bad quarter — a fuel spike, a labor deal, a demand softening — and the world's largest airline by available seat miles crosses from building shareholder value to consuming it.

But the 10-K tells a more nuanced story than the razor-thin spread suggests. Buried in the footnotes are three businesses traveling in three different directions under a single ticker: a base airline where pricing power is eroding (PRASM fell 2.9%), an ancillary revenue machine growing at nearly double the airline's rate (6.7%), and a loyalty franchise — MileagePlus — that surged 10.3% and is now, for the first time since COVID, completely free of secured debt. The market prices all three at a single 5.75x EV/EBITDA. The filing suggests that's a mistake.

The Airline Is Running to Stand Still

United Airlines' core airline operation is a capital-intensive business barely creating economic value. At 7.6% ROIC against a 6.2% cost of debt, the spread that separates shareholder value creation from destruction has narrowed to roughly 150 basis points. For context, Delta Air Lines earns 10.8% ROIC — a 320-basis-point advantage — while carrying less than half the leverage. UAL isn't failing, but it's running an enormous operation for thin returns on an enormous capital base.

The operating leverage problem makes this worse. In FY2025, operating expenses grew 4.6% while revenue grew 3.5% — a 1.1 percentage point negative leverage gap. This isn't a one-quarter anomaly. The gap widened to 1.4 percentage points in Q4 as fuel costs reversed, with Q4 fuel expense jumping 9.2% year-over-year even as the full-year figure declined 3.1%. Landing fees surged 12.0% to $3.8 billion. Salaries climbed 5.8% as headcount grew to 111,900. Management's CASM-ex metric — stripping fuel, profit sharing, and special charges — shows a benign 0.4% increase. But GAAP CASM tells the real story: costs are growing faster than revenue, and the favorable fuel environment that masked this in the first three quarters reversed decisively in Q4.

"We also subsequently adjusted certain of our assumptions as a result of the increase in costs due to infrastructure improvements, new labor contracts and aircraft maintenance that were needed to support our United Next plan as well as delays in aircraft deliveries."

That admission — buried in risk factors, not the investor presentation — is management acknowledging that their $5.87 billion annual capex program is costing more than originally projected. At guided 2026 capex of under $8.0 billion, UAL is betting the "United Next" network expansion will eventually generate returns that justify the investment. Meanwhile, PRASM declined 2.9% across all regions to 16.18 cents, with the starkest deterioration in Latin America, where Q4 PRASM collapsed 7.6% against a full-year decline of 5.2%. Capacity grew 6.1% in available seat miles, but load factor dropped 0.84 percentage points to 82.2%. UAL is filling more planes at lower prices — the textbook definition of running to stand still.

Compared against capital-intensive industrial peers — not just airline peers — to benchmark returns against similar asset bases, UAL stands out for its combination of high capex intensity (10.0% of revenue, the highest in the peer set) and low ROIC (7.6%, second-lowest). DAL is the only true airline comparable, and the gap is stark: Delta achieves higher returns on lower leverage with less capital intensity. UAL's 7.6% return on invested capital barely exceeds its 6.2% cost of debt, leaving roughly 150 basis points between value creation and destruction as operating expenses outpaced revenue growth by 1.1 percentage points in FY2025.

Three Revenue Streams, Three Trajectories

The PRASM headline is telling investors the wrong story. When analysts cite UAL's 2.9% PRASM decline as evidence of pricing weakness, they're blending three revenue streams with fundamentally different economic characteristics into a single metric — and the composite masks a structural quality improvement.

The 10-K footnotes allow us to decompose UAL's revenue into three layers, each growing at a different rate with different cyclical characteristics. This three-layer decomposition is the analytical key to understanding why UAL's revenue quality is better than the headline suggests.

The lowest-quality layer — base ticket revenue, driven by PRASM and subject to competitive pricing pressure — grew just 2.3%. The medium-quality layer — ancillary fees including baggage, premium seat upgrades, and inflight amenities — grew 6.7% to $4.8 billion, embedded within the passenger revenue line where it artificially props up the PRASM calculation. Strip the ancillaries out, and base ticket PRASM declined even more sharply than the headline -2.9% suggests.

"The Company recorded $4.8 billion, $4.5 billion and $4.1 billion of ancillary fees within Passenger revenue in the years ended December 31, 2025, 2024 and 2023, respectively."

The highest-quality layer — MileagePlus partner revenue, primarily the Chase co-brand credit card agreement — grew 10.3% to $3.2 billion. This is recurring, contract-based revenue that doesn't fluctuate with load factors or fuel prices. It grew at three times the airline's rate. The three-year compounding rate is 8.9% ($2.7B to $2.9B to $3.2B), and the trend is accelerating.

What this means for investors: the revenue mix is structurally improving even as PRASM declines. The headline metric — one that dominates sell-side research and earnings call Q&A — conceals a quality migration from commodity seat pricing toward stickier, higher-margin revenue streams. Advance ticket sales recognition also grew 9.4% to $5.8 billion, confirming that forward demand remains robust even as pricing weakens. The paradox of strong volume and weak pricing is real, but the filing shows the resolution: UAL is monetizing passengers through ancillary fees and loyalty rather than base fares. United Airlines' filing reveals three diverging revenue streams — base ticket revenue growing just 2.3%, ancillary fees accelerating at 6.7%, and MileagePlus loyalty revenue surging 10.3% — masked by the headline PRASM decline of 2.9%.

The $20 Billion Program Nobody Owns

MileagePlus is the most underappreciated asset in the airline sector. In FY2025, the program generated $3.2 billion in partner agreement revenue, holds $7.78 billion in deferred revenue on the balance sheet, and serves 130 million members. These are financial-services-grade metrics sitting inside an airline wrapper. And for the first time since the COVID-era emergency borrowing, MileagePlus is completely free of liens.

"On July 7, 2025, Mileage Plus Holdings, LLC...redeemed in full all $1.52 billion aggregate principal amount of the Issuers' outstanding MileagePlus 6.5% senior secured notes due 2027... As a result of the Redemption and the July 2024 voluntarily prepayment in full of the $1.80 billion outstanding principal balance of the secured term loan facility...all indebtedness secured by the MileagePlus assets have been fully repaid."

The repayment of $3.32 billion in MileagePlus-secured debt ($1.80 billion term loan prepaid July 2024, $1.52 billion notes redeemed July 2025) is the single most important structural change in the filing. It makes a partial IPO, securitization, or spinoff of MileagePlus mechanically possible — the legal liens that would have prevented separation are gone. No other major U.S. airline has an unencumbered loyalty program of this scale. Delta's SkyMiles, for comparison, backed a multi-billion-dollar Amex partnership financing facility and remains encumbered.

The deferred revenue roll-forward reveals the program's hidden economics. Opening balance: $7,441 million. Miles earned (new liability): $3,883 million. Miles redeemed for travel: $3,414 million. Miles redeemed for non-travel: $133 million. Closing balance: $7,777 million. The net annual accretion of $336 million means MileagePlus is growing its quasi-asset base by absorbing more loyalty revenue than it fulfills — and the cost to fulfill a mile redemption is structurally below the revenue recognized when the mile was sold to Chase.

The math has a critical caveat: no management signal of separation intent exists in the filing. MileagePlus's value depends on the airline continuing to generate redemption opportunities — miles are only valuable if people can fly on them. A pure spinoff would require managing this symbiotic relationship through commercial agreements, adding complexity and potentially reducing the standalone multiple. But even if separation never happens, the unencumbered status gives UAL a strategic option that didn't exist 18 months ago. United Airlines' MileagePlus program generated $3.2 billion in partner revenue in FY2025 and carries $7.78 billion in deferred revenue, yet all $3.32 billion of secured debt against the program was fully repaid, making it unencumbered for the first time since COVID.

Deleveraging on a Treadmill

UAL's balance sheet improvement is real and substantial. GAAP debt fell from $24.8 billion to $21.4 billion — a $3.5 billion net reduction. Debt-to-equity improved from 1.94x to 1.39x. The company repaid $4.77 billion in debt and issued zero new long-term debt. Both Moody's (Ba2) and Fitch (BB) assigned positive outlooks, signaling a potential upgrade to investment grade. By the headline metrics, this is a deleveraging success story.

But management's own non-GAAP adjusted debt tells a different story. The 8-K earnings release reconciliation reveals total obligations of $32.1 billion — 50% above the GAAP figure. The gap: $6.0 billion in operating lease obligations that represent unavoidable cash commitments (UAL can't stop leasing gate space), $1.1 billion in pension and postretirement liabilities, and finance leases. Investors who rely on the GAAP balance sheet underestimate UAL's true fixed obligations by $10.7 billion.

"As of September 30, 2025, the Company had approximately $31.3 billion of debt, finance lease, operating lease and other financial liabilities, including $5.2 billion that will become due in the next 12 months."

The free cash flow picture compounds the concern. FCF collapsed 33.2%, from $3.83 billion to $2.56 billion ($8,432M OCF minus $5,874M capex). Operating cash flow declined $1.0 billion year-over-year as the operating leverage gap consumed margin gains, and a $300 million pension contribution drained additional cash. Meanwhile, management approved $637 million in share buybacks at an average price of $78.75 — a 293% increase over the prior year — even as the stock subsequently fell significantly.

The forward math is concerning. At guided 2026 capex of under $8.0 billion (call it $7.5 billion at mid-range) and flat operating cash flow of ~$8.4 billion, free cash flow compresses to approximately $0.9 billion. The current 7.0% FCF yield would collapse to roughly 2.5%. The deleveraging is real, but the cash that funded it came at the expense of liquidity: working capital deteriorated from -$4.4 billion to -$9.3 billion, and the current ratio fell from 0.81 to 0.65. UAL directed cash toward debt paydown rather than preserving its financial cushion. Delta, by contrast, achieves 10.8% ROIC with 0.64x debt-to-equity and 7.1% capex-to-revenue — a 320-basis-point ROIC gap on meaningfully lower leverage and capex intensity. UAL reduced GAAP debt by $3.5 billion in FY2025, but management's own non-GAAP adjusted total debt of $32.1 billion is 50% higher than the $21.4 billion GAAP figure, incorporating $6 billion in operating leases and $1.1 billion in pension obligations investors typically overlook.

What the Next Filing Must Show

The thesis — that UAL's three-business model is mispriced at a single multiple — has a concrete test window. Q1 and Q2 2026 filings will provide the data to validate or falsify the case within six months. Three metrics matter most.

"The imposition of new tariffs, any increase in existing tariffs, and retaliatory tariffs implemented by other countries where United operates...could increase the Company's operating costs and create additional uncertainty related to economic conditions."

The 10-K discloses that UAL maintains zero fuel hedges — a deliberate policy choice that leaves the company fully exposed to jet fuel price volatility. With jet fuel spiking approximately 58% in early 2026 due to geopolitical conflict, this structural exposure is about to hit the income statement. Q4 already showed the preview: fuel expense rose 9.2% in a quarter where full-year fuel costs declined 3.1%. The negative operating leverage gap, which widened from 1.1 percentage points full-year to 1.4 percentage points in Q4, could expand to 3–6 percentage points in Q1 2026 if fuel stays elevated and the new flight attendant contract adds additional CASM pressure.

Management's March 2026 announcement of a 5% capacity cut is the first corrective response. If PRASM stabilizes or turns positive in Q1 — the first positive quarter in roughly five quarters — it validates the capacity discipline thesis. The MileagePlus loyalty overhaul effective April 2, 2026, which gates miles earning behind co-branded credit cards, is designed to accelerate Chase partnership revenue. The first quarter with measurable overhaul impact will be Q2 2026, visible in Other Operating Revenue.

At $112 per share, the market prices UAL at 10.8x trailing earnings and 5.75x EV/EBITDA — the cheapest valuation in the transportation peer set. The 7.0% FCF yield implies investors demand a high cash return to bear the cyclical risk. The filing supports the quality of the embedded loyalty asset — MileagePlus is growing, unencumbered, and mechanically separable — but complicates the near-term picture with unhedged fuel exposure, widening negative operating leverage, and a capex program that could compress FCF to under $1 billion. The sum-of-parts math suggests the airline residual trades at distressed-level valuations, implying either the market doesn't believe in separation optionality or it sees the airline's capital needs eventually consuming MileagePlus's cash generation.

The next two quarters will determine which reading is correct. United Airlines' zero fuel hedging policy leaves it fully exposed to the 58% jet fuel spike in early 2026, with Q4 2025 already showing the negative operating leverage gap widen from 1.1 to 1.4 percentage points as fuel costs rose 9.2%.

Frequently Asked Questions

What was United Airlines' revenue in FY2025?

United Airlines (UAL) reported total revenue of $59.07 billion in FY2025, a 3.5% year-over-year increase. Passenger revenue was $53.4 billion (+3.1%), cargo $1.78 billion, and other operating revenue $3.85 billion (+10.4%). Growth was driven by volume — passengers +4.3%, ASMs +6.1% — while PRASM declined 2.9% to 16.18 cents.

What is UAL's return on invested capital, and is it creating value?

UAL's ROIC was 7.6% in FY2025, barely clearing its 6.2% cost of debt by roughly 150 basis points. By comparison, Delta Air Lines achieved 10.8% ROIC — a 320-basis-point advantage. Any deterioration in operating performance could push UAL's ROIC below cost of debt, meaning the company would be destroying economic value.

How much debt does United Airlines have?

The answer depends on which measure you use. GAAP total debt was $21.4 billion as of December 31, 2025, down from $24.8 billion — a $3.5 billion reduction. However, management's non-GAAP adjusted total debt was $32.1 billion, incorporating $6.0 billion in operating leases and $1.1 billion in pension liabilities. This 50% gap means investors using only GAAP metrics materially underestimate total obligations. Net debt stood at $15.2 billion (GAAP) or $19.9 billion (adjusted).

What is MileagePlus worth, and why does it matter?

MileagePlus generated $3.2 billion in partner agreement revenue in FY2025 (+10.3%), primarily from the Chase co-branded credit card. The program has 130M+ members and a deferred revenue balance of $7.78 billion (+4.5%). All $3.32 billion of MileagePlus-secured debt was fully repaid in 2024-2025, making the program unencumbered for the first time since COVID. At 6-7x partner revenue, MileagePlus could be valued at $19-22 billion — roughly half of UAL's enterprise value. This creates a sum-of-parts paradox where the loyalty program alone may be worth more than the market gives the entire company credit for.

Why did UAL's free cash flow decline 33%?

Free cash flow fell from approximately $3.83 billion to $2.56 billion (OCF $8,432M minus capex $5,874M). Operating cash flow declined $1.0 billion due to lower operating income growth and a $300M pension contribution. Capital expenditures remained elevated at $5.87 billion as the United Next fleet modernization continued. With capex guided to under $8.0 billion for 2026, FCF could compress further to under $1 billion if OCF doesn't improve.

How does UAL compare to Delta Air Lines (DAL)?

DAL is UAL's closest comparable and outperforms on almost every financial metric: operating margin 9.2% vs 8.0%, ROIC 10.8% vs 7.6%, and FCF margin 6.1% vs 4.3%. DAL achieves these superior returns with significantly less leverage — D/E of 0.64x versus UAL's 1.39x. UAL trades cheaper at 5.75x EV/EBITDA vs DAL's 6.72x, reflecting its higher risk profile. UAL's structural advantages are its larger widebody fleet for premium international routes and an unencumbered loyalty program.

What does UAL's PRASM decline mean for investors?

PRASM declined 2.9% to 16.18 cents, but this headline is misleading in both directions. Stripping out the 6.7% growth in ancillary fees ($4.8B embedded within passenger revenue), base ticket pricing declined more sharply. On the positive side, the decline narrowed from -2.9% full-year to -1.4% in Q4, and the March 2026 5% capacity cut should support pricing. The deeper concern is Latin America, where PRASM collapsed 7.6% in Q4, signaling overcapacity in price-sensitive markets.

Does United Airlines hedge fuel?

No. UAL does not hedge fuel, leaving it fully exposed to jet fuel price volatility. This is a deliberate policy choice — management has historically argued hedging doesn't create long-term value. FY2025 fuel expense declined 3.1% to $11.4 billion, but this reversed in Q4 where fuel expense rose 9.2%. With jet fuel up approximately 58% in early 2026, UAL faces outsized near-term earnings risk compared to Delta, which has historically hedged a portion of fuel consumption.

What is the United Next plan and how much does it cost?

United Next targets 630+ new aircraft through 2034 with approximately 120 deliveries planned for 2026. FY2025 capex was $5.87 billion — a 2.0x capex-to-depreciation ratio, meaning UAL spends $2 for every $1 it depreciates. Management guided adjusted capex to under $8.0 billion for 2026. The 10-K risk factors reveal management adjusted assumptions for increased infrastructure costs, new labor contracts, and aircraft delivery delays.

Should investors worry about UAL's working capital deficit?

The working capital deficit widened from -$4.4 billion to -$9.3 billion, and the current ratio fell from 0.81 to 0.65. This is structurally normal for airlines — UAL collects payment before flying, so advance ticket sales ($5.8B recognized in FY2025) are a current liability. The deterioration is partly deliberate: $4.77 billion went to debt repayment rather than liquidity preservation. UAL maintains a $3 billion undrawn credit facility as a safety net.

What are the key risks to UAL in 2026?

Four critical risks: (1) Unhedged fuel exposure with jet fuel up approximately 58% in early 2026. (2) A new flight attendant contract expected mid-2026 adding CASM pressure on top of the 5.8% salary growth already embedded. (3) Tariff and recession risk explicitly flagged in 10-K risk factors, with Latin America PRASM collapse potentially a leading indicator. (4) An $8.2 billion debt maturity wall — $4.1 billion within 12 months and $4.1 billion in 1-3 years — requiring refinancing or continued cash allocation away from returns.

Is UAL stock cheap at current prices?

At 10.8x trailing P/E and 5.75x EV/EBITDA, UAL is the cheapest stock in the transportation peer set. The 7.0% FCF yield looks attractive. But the low multiple reflects real risks: zero fuel hedging, the highest cost of debt among peers (6.2%), and a ROIC spread so thin that any cyclical downturn pushes the company into value destruction. The sum-of-parts analysis suggests MileagePlus may be worth ~$20 billion, implying the residual airline trades at 0.29x P/S — either a deep value opportunity with a hidden loyalty asset, or a value trap where the airline's capital needs consume the loyalty program's cash. The next two to three quarters will determine which.

Methodology

Data Sources

This analysis is based on United Airlines Holdings' 10-K filed 2026-02-12 for FY2025 (ending 2025-12-31) and Q3 2025 10-Q filed 2025-10-16, accessed via MetricDuck's filing text extraction pipeline. Sections analyzed include MD&A Results of Operations, MD&A Liquidity and Capital Resources, Risk Factors, revenue recognition footnotes, and debt footnotes. Quantitative data sourced from MetricDuck's automated metrics pipeline for UAL, DAL, FDX, UPS, and CSX. Q4 2025 data from the 8-K earnings release GAAP reconciliation tables.

Analytical Framework

This article applies a three-layer revenue quality decomposition — separating consolidated revenue into base ticket revenue (derived by subtracting ancillary fees from passenger revenue), ancillary fees (explicitly disclosed in footnotes), and loyalty/partner revenue (explicitly disclosed in footnotes) — to reveal quality shifts masked by blended PRASM metrics. Sum-of-parts valuation uses partner revenue as the proxy (not EBITDA, which is not separately disclosed), with multiple ranges reflecting comparable loyalty program economics. All derived numbers include source formulas and can be verified against filing footnotes.

Limitations

• MileagePlus standalone margins are not disclosed. The $3.2B partner revenue is gross; operating costs, margins, and cash flows are embedded in consolidated results. The sum-of-parts valuation assumes separability that may not reflect true standalone economics.
• The 6-7x loyalty multiple is an estimate, not a transaction comp. The range reflects general loyalty program economics with ±30% uncertainty. No direct precedent exists for an unencumbered airline loyalty program of this scale being separated or sold.
• Regional profitability data is unavailable. The assertion that Pacific routes are more profitable rests on yield/PRASM data and widebody economics, not disclosed regional margins.
• Cross-modal peer comparison has structural limitations. Railroads (CSX) and logistics companies (FDX, UPS) operate at significantly different margins vs. 8% for airlines. The comparison benchmarks capital allocation discipline, not business model similarity.
• Post-filing events (5% capacity cut, loyalty overhaul, fuel spike) are incorporated for forward context but are not verifiable from the 10-K. These are clearly labeled as post-filing.
• Cost of debt for DAL and FDX is not available in pipeline data, limiting the ROIC-vs-CoD comparison across the full peer set.

Disclaimer:

This analysis is for informational purposes only and does not constitute investment advice. The author does not hold positions in UAL, DAL, FDX, UPS, or CSX. Past performance and current metrics do not guarantee future results. All data is derived from public SEC filings and may contain errors or omissions from the automated extraction process. Investors should independently verify all figures before making investment decisions.