DELTA AIR LINES, INC. (DAL) stock intrinsic value fair value estimate & owner earnings analysis

Delta Air Lines is the largest US network airline by revenue ($63.4 billion in 2025), flying from hubs such as Atlanta, Minneapolis, Detroit, Salt Lake City and New York. It earns money from tickets, especially premium cabins, from the SkyMiles loyalty program (American Express paid Delta $8.2 billion in 2025, up 11%), from aircraft maintenance work for others, from cargo, and from its own Trainer oil refinery near Philadelphia, which trims the refining margin in its jet fuel bill. How we measure earnings. We start with operating cash flow and take out three things: swings in working capital (ticket sales and mileage prepayments that Delta receives before flying, receivables, profit-sharing timing), which moved cash flow by anywhere from minus $1.2 billion to plus $2.5 billion a year; stock compensation ($313 million in 2025); and the part of aircraft and equipment spending needed just to stand still (about 90% of the $4.5 billion spent in 2025; growth spending is estimated from the company's own spending-to-revenue history). On that basis Delta's owner earnings per share were $3.31 in 2025, $3.54 in 2024 and $2.67 in 2023, versus a loss of $10.99 in the 2020 pandemic year. Because lenders are paid first, we then add back cash interest ($850 million in 2025) to get the cash the business itself produces: $4.61, $5.09 and $4.48 per share in 2025, 2024 and 2023. We value that stream at a flat 6%, and subtract net debt. Normal level. We measured the business over 2016 to 2025, leaving out only 2020 (a near-total shutdown of air travel). The middle year of that window is about $4.48 per share. We trimmed that to $4.32 because Delta used up substantially all of its older tax-loss carryforwards in 2025 and began paying cash federal income tax; about $2.4 billion of newer losses will be used in 2026 and then that shelter is gone. Growth check: business cash flow per share fell 9.4% in 2025 ($4.61 from $5.09); our base case starts at $3.89, below the 2025 figure, so it assumes no rebound. Early 2026 supports treating the level as intact: first-half operating cash flow was $4.03 billion versus $4.24 billion a year earlier (down 5%) even though revenue rose 16% and, per the company's June-quarter release, jet fuel averaged about $3.93 a gallon, up roughly 75%. Fares have so far covered the fuel spike. What the shares appear to be worth. Base case, $46.89 per share. Business cash flow of $3.89 per share for every year, which is 90% of the $4.32 normal level; the 10% haircut stands for a mild downturn costing about one year of cash flow each decade, since airlines have suffered deep downturns repeatedly and Delta's own record shows 2020 to 2022. No growth is credited. Delta is adding capacity only about 1% a year, and the fleet-renewal spending (aircraft purchase commitments of $15.4 billion, including widebody orders that begin delivering in 2029) is already charged as ongoing cost. The American Express remuneration, which management expects to reach $10 billion, is a target, not a contract we can see, so it is left out. The same level is carried past year 10 because what produces it (hub network, loyalty program, fleet replacement already paid for in our cost) is in place today; no growth is assumed. The business is worth about $64.80 per share (roughly $42.6 billion). It owes about $17.91 per share (roughly $11.8 billion): $13.95 billion of debt and finance leases at June 30, 2026, less $2.17 billion of the $4.67 billion cash balance that we treat as beyond what an airline needs to operate. Average interest is close to 6% ($850 million on roughly $14 billion), so no adjustment for cost of debt. Operating leases and pension contributions already run through cash flow and are not subtracted again. Difference: $46.89. Bear case, $23.01 per share. A downturn on top of the fuel squeeze: business cash flow of $3.50 in year 1, then the levels Delta actually produced in 2021 and 2022 ($0.21 in year 2, $2.12 in year 3), and afterwards only $2.70 a year permanently. That permanent level takes off $0.75 for tax deferrals fading (cash taxes have already begun) and assumes recurring downturns cost a quarter of normal cash flow. In year 2 the business cash flow falls below the annual interest bill (about $1.29 per share), so we also add $1.4 billion of higher borrowing cost, similar to the step-up in 2021 when cash interest reached $1.5 billion versus $0.85 billion now. Debt is investment grade (Moody's Baa2), but $3.4 billion falls due within twelve months, including a $1.3 billion term loan due December 2026, and about $3.5 billion is scheduled for 2028, so refinancing during a downturn is the pressure point. The business is worth about $43.05 per share; it owes about $20.04; difference $23.01. Bull case, $71.42 per share. Business cash flow starts at the 2024 level of $5.09, less a 5% allowance for ordinary downturns, and grows 3% a year for four years (to about $5.44 per share), then stays flat. The growth rests on the American Express relationship, where cash from selling miles under marketing agreements rose from $6.9 billion in 2023 to $8.0 billion in 2025; we credit only a fraction of that pace and stop at four years. The business is worth about $89.34 per share; it owes $17.91; difference $71.42. What would make this wrong: jet fuel staying high without fares keeping pace (a fuel-cost spike is happening now); a recession; less favourable American Express terms; or pension funding well above today's level (the pension shortfall on the balance sheet is about $3.1 billion). Delta's minority airline stakes, such as the 12.7% WestJet stake bought for $276 million in October 2025, are not valued separately, which is a possible upside we did not count. Since our previous estimate ($44 base, $14 bear, $71 bull), we moved to a flat 6% required return and to valuing the business before debt; the earnings base is now lower because mileage and ticket prepayments are treated as timing rather than earnings, and we lowered it for the tax shelter running out. That leaves the base slightly higher and the bear case higher, mainly because the required return is lower. The June-quarter results and balance sheet come from the company's quarterly filing data; the fuel price comes from the company's earnings release.