Here's the Best Airline Stock to Buy for 2024

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I won't sugarcoat this: Traditionally, airlines have not been great investments, at least not for those interested in equities. Still, there's strong reason to believe that won't always be so.

Delta Air Lines (NYSE: DAL) is an excellent example of a stock that can buck the trend and remain the pick of the transportation sector. Here's why the stock is a great value.

Equity investors and bond investors view airline stocks differently

With even Warren Buffett having lost money on airline stocks in the past, it makes sense that ordinary investors approach the matter with circumspection. The industry's long-term issue comes down to its inability to generate a return on capital necessary to cover its cost of capital.

As the International Air Transport Association argues, "Even prior to the COVID-19 crisis, equity owners had not been rewarded adequately for risking their capital," because "average airline returns have rarely been as high as the industry's cost of capital."

That's bad news for equity investors, since the average airline isn't generating any economic value. But it's not bad news for debt providers because they have been rewarded for putting up capital, with their investment backed up by a relatively liquid asset, the airplanes themselves. It's also good news for airplane suppliers, whose profits, you could argue, are supported by equity investors' losses.

Why Delta is different

At this point, I would understand why investors might want to run away and start looking at aerospace suppliers, but bear with me a second because I think Delta Air Lines is an option worth looking at very closely.

Digging into the recent presentation at the J.P. Morgan Industrials Conference, Delta's management noted that the recovery in air travel means it's already significantly covering its cost of capital and is set to improve its cover in the coming years.

Delta Air Lines

2022

2023

Long-Term Target

Return on invested capital

8.40%

13.40%

Mid-teens

Weighted average cost of capital

8%

8%

8%

Data source: Delta Air Lines.

In other words, Delta is now generating value for equity investors. It's doing so because of a significant increase in earnings and cash flow as the commercial aerospace industry recovers from the travel restrictions imposed during the worst of the pandemic.

The table below shows the company's improvements in earnings and cash flow. I've also included its adjusted debt to earnings before interest, taxation, depreciation, amortization, and rent (EBITDAR) multiple. This is a typical leverage ratio that debt investors use for gauging credit quality, demonstrating Delta's creditworthiness improvement.