Legendary fund manager Li Lu (who Charlie Munger backed) once said, 'The biggest investment risk is not the volatility of prices, but whether you will suffer a permanent loss of capital.' So it seems the smart money knows that debt - which is usually involved in bankruptcies - is a very important factor, when you assess how risky a company is. As with many other companies Delta Air Lines, Inc. (NYSE:DAL) makes use of debt. But is this debt a concern to shareholders?

Why Does Debt Bring Risk?

Generally speaking, debt only becomes a real problem when a company can't easily pay it off, either by raising capital or with its own cash flow. Part and parcel of capitalism is the process of 'creative destruction' where failed businesses are mercilessly liquidated by their bankers. However, a more frequent (but still costly) occurrence is where a company must issue shares at bargain-basement prices, permanently diluting shareholders, just to shore up its balance sheet. Having said that, the most common situation is where a company manages its debt reasonably well - and to its own advantage. The first step when considering a company's debt levels is to consider its cash and debt together.

What Is Delta Air Lines's Net Debt?

You can click the graphic below for the historical numbers, but it shows that Delta Air Lines had US$17.7b of debt in September 2024, down from US$19.1b, one year before. On the flip side, it has US$3.98b in cash leading to net debt of about US$13.7b.

How Strong Is Delta Air Lines' Balance Sheet?

We can see from the most recent balance sheet that Delta Air Lines had liabilities of US$28.1b falling due within a year, and liabilities of US$33.6b due beyond that. Offsetting these obligations, it had cash of US$3.98b as well as receivables valued at US$3.55b due within 12 months. So its liabilities outweigh the sum of its cash and (near-term) receivables by US$54.2b.

Given this deficit is actually higher than the company's massive market capitalization of US$40.9b, we think shareholders really should watch Delta Air Lines's debt levels, like a parent watching their child ride a bike for the first time. Hypothetically, extremely heavy dilution would be required if the company were forced to pay down its liabilities by raising capital at the current share price.

We use two main ratios to inform us about debt levels relative to earnings. The first is net debt divided by earnings before interest, tax, depreciation, and amortization (EBITDA), while the second is how many times its earnings before interest and tax (EBIT) covers its interest expense (or its interest cover, for short). The advantage of this approach is that we take into account both the absolute quantum of debt (with net debt to EBITDA) and the actual interest expenses associated with that debt (with its interest cover ratio).

With a debt to EBITDA ratio of 1.6, Delta Air Lines uses debt artfully but responsibly. And the alluring interest cover (EBIT of 8.1 times interest expense) certainly does not do anything to dispel this impression. Also good is that Delta Air Lines grew its EBIT at 12% over the last year, further increasing its ability to manage debt. The balance sheet is clearly the area to focus on when you are analysing debt. But it is future earnings, more than anything, that will determine Delta Air Lines's ability to maintain a healthy balance sheet going forward. So if you want to see what the professionals think, you might find this free report on analyst profit forecasts to be interesting.

Finally, while the tax-man may adore accounting profits, lenders only accept cold hard cash. So it's worth checking how much of that EBIT is backed by free cash flow. Over the last three years, Delta Air Lines reported free cash flow worth 19% of its EBIT, which is really quite low. That limp level of cash conversion undermines its ability to manage and pay down debt.

Our View

We'd go so far as to say Delta Air Lines's level of total liabilities was disappointing. But on the bright side, its interest cover is a good sign, and makes us more optimistic. Looking at the balance sheet and taking into account all these factors, we do believe that debt is making Delta Air Lines stock a bit risky. Some people like that sort of risk, but we're mindful of the potential pitfalls, so we'd probably prefer it carry less debt. The balance sheet is clearly the area to focus on when you are analysing debt. However, not all investment risk resides within the balance sheet - far from it. For example, we've discovered 2 warning signs for Delta Air Lines that you should be aware of before investing here.

If, after all that, you're more interested in a fast growing company with a rock-solid balance sheet, then check out our list of net cash growth stocks without delay.

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This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.