Delta’s share price still assumes a weak airline with flat growth, thin margins and a lasting balance-sheet penalty. I think that view is too harsh. Delta looks like a stronger, steadier business than the market is pricing in, which leaves the shares materially undervalued.

Executive summary

• Company: Delta Air Lines, Inc. * Ticker: DAL * Current price: $67 * Estimated intrinsic value: $114 * Upside/downside percentage: +71% * Expected IRR: 15.6%

Summary: I think the market still values Delta as if its earnings power is fragile, growth is near zero and balance-sheet risk deserves a permanent penalty. I see a better business than that, with stronger through-cycle margins, more durable revenue and lower financing risk than the share price implies.

Market expectations

• Implied long-term revenue growth: -0.9% * Implied steady-state margin: 4.8% * Implied return on equity: Below my 14% steady-state base case, implying only modest value creation in maturity. * What must be true for the current price to make sense: Delta would need to remain a low-growth, thin-margin airline that never fully sheds its old risk discount.

Investment Thesis

Delta shares trade at $67, and I think they are materially undervalued. At this level, the market is implicitly assuming that long-run revenue growth is about -0.9%, steady-state net margin settles near 4.8%, and investors should keep applying a heavy risk premium to the stock. I think those assumptions are too severe for an airline with Delta’s premium network, strong loyalty economics, useful ancillary businesses and an improving balance sheet. My base-case value is $114 a share.

The market still seems to treat Delta as a structurally fragile airline. I think that view is old. Delta is not just selling seats. Its premium cabins, corporate share, SkyMiles programme, TechOps business and even the Monroe refinery all add to revenue quality and resilience. They do not remove cyclicality, but they do make the company better than a plain fare-box business. That matters because valuation depends on through-cycle economics, not on one soft fare period.

The growth debate looks too one-sided. I do not need Delta to become a growth stock to justify a higher value. I only need it to keep expanding modestly. My base case assumes 4.5% revenue growth in the next stage of the cycle. The current price implies something closer to stagnation. I find that too harsh. Delta produced about $63.4bn of revenue in 2025, management pointed to roughly 5% to 7% revenue growth for the March quarter of 2026, and analysts see revenue reaching roughly $72.9bn by 2029. For a mature airline, that is enough. The point is not that Delta needs heroic growth. The point is that the business is not shrinking.

SkyMiles is one reason I think the top line is more durable than the share price suggests. Delta collected $8.2bn from American Express in 2025, and management expects that figure to keep growing. This is high-quality revenue. It depends on customer engagement, brand strength and partner value, not just on the next fare cycle. TechOps, cargo, vacations and refinery activity add smaller but still useful support around the edges. Together they make Delta’s revenue base broader and stickier than many investors allow.

The bigger gap, though, is margin. At $66.76, the market is pricing Delta as if it can only sustain a 4.8% long-run net margin. I think 7.5% is more reasonable. Delta generated about $5.0bn of operating income and $4.6bn of free cash flow in 2025. Premium mix, corporate demand, loyalty earnings and network scale should let it hold better pricing and better fixed-cost absorption than a weaker carrier. Management’s framework for low-single-digit non-fuel unit cost growth also matters. I am not assuming perfect execution or cheap fuel. I am assuming that a better franchise should earn better through-cycle margins.

The balance sheet matters more than many investors admit. Airlines usually attract a stiff discount because leverage, fuel volatility and recessions can be brutal. I understand that. But I think investors are still punishing Delta for an older balance-sheet story. Liquidity looks solid, free cash flow is healthy, and about $1.4bn of 2026 maturities looks manageable. If Delta keeps reducing or refinancing debt without stress and wins more visible credit progress, the required return investors demand should fall. That alone could close part of the valuation gap.

The valuation looks cheap on simpler checks too. Delta trades on about 9.1 times earnings, 0.7 times sales and 2.9 times book value, all near the low end of comparable airlines and transport names. A move merely towards peer median multiples points to a value of roughly $110 to $140 a share. I do not treat that as proof. I treat it as confirmation that the current discount is deep.

My base case gives me $114 a share, or 71% upside from the current price, with an expected IRR of 15.6%. My optimistic case is $165, where premium demand, corporate travel and loyalty monetisation all work together and margins stay stronger for longer. My pessimistic case is $72, where revenue growth slows to 2.8% and steady-state margin slips to 5.3%. The key point is not that Delta is risk-free. It is that today’s price already sits close to a fairly dour outcome.

I can still be wrong. The clearest risk is that TRASM stays weak, especially if softer yields show up across several quarters rather than one. Fuel and labour costs could also rise faster than Delta can pass them through. And regulatory or geopolitical pressure on international partnerships could hurt network economics. If those things arrive together, intrinsic value could slip towards the mid-$50s to $70s. That is why I see Delta as attractive, not easy.

What Would Change My View

• I would grow more positive if premium demand, SkyMiles revenue and corporate share keep improving while non-fuel unit costs remain under control. That would support a higher long-run margin. * I would grow more positive if Delta works through its 2026 maturities cleanly and earns more visible credit improvement. That would lower the discount rate and lift fair value. * I would turn more cautious if TRASM remains weak for several quarters, labour and fuel inflation stay sticky, or partnership and regulatory issues weaken international profitability. That would make the market’s low-margin view look more credible.