Delta Air Lines stock has more than doubled over the past five years, and after that strong run, investors are weighing whether the current price still lines up with what the broader valuation checks suggest about its appeal.

• Over 5 years, Delta Air Lines has returned 106.0%, which puts current holders in a strong position and raises the bar for fresh buyers looking for further upside from here.
• Solid demand and higher fares can support earnings, while sensitivity to fuel and labor costs may limit how much of that pricing power ultimately flows through to long term cash generation.
• Delta screens as attractively priced on several metrics, with the broader checks leaning cheap as it is undervalued in 5 of 6 valuation tests.

The stock's next move may depend on whether the market has already priced in Delta Air Lines' stronger pricing power and recent share price gains, or if there is still a margin of safety at current levels.

Is Delta Air Lines Still Cheap on Earnings?

The P/E ratio is a useful way to think about what you are paying for each dollar of Delta Air Lines earnings today. Delta currently trades on a P/E of 13.6x, which sits above the broader airlines industry average of 9.2x, but below the peer group average of 22.3x.

On a more tailored view of Delta Air Lines earnings power, the fair P/E suggested by the valuation model is 31.3x, which is above the current 13.6x multiple. That gap indicates the stock is pricing in a more cautious outlook than the model’s assessment of its growth, profitability and risk profile. Despite recent headlines around elevated fares and travel demand, the market multiple remains below the level implied by this framework.

Overall, Delta Air Lines stock appears undervalued on its current P/E multiple compared with both peers and the fair value benchmark.

The Delta Air Lines Narrative: What Would Justify Today's Price?

For Delta Air Lines' valuation puzzle, Simply Wall St Narratives set out alternative futures for the company, spelling out what would need to happen to growth, margins and earnings for the stock to look meaningfully cheaper or more expensive than it does today. These narratives sit on Simply Wall St's Community page. Rather than relying on a single multiple or model point estimate, each narrative outlines the assumptions behind its view of fair value so you can compare those to Delta Air Lines' actual results over time.

Community views on Delta Air Lines sit on very different sides of the valuation fence, and the gap between them is clear.

Bull case: 34% undervalued

"Ongoing investments in customer experience, brand strength, and the expansion of the Delta SkyMiles and American Express co-brand program are expected to enhance customer loyalty and increase high-margin revenue streams…"

Bear case: roughly fairly valued

"Economic uncertainty and stalled growth, particularly in domestic and main cabin travel, pose risks to Delta's revenue growth and net margins as demand softens…"

Do you think there's more to the story for Delta Air Lines? Head over to our Community to see what others are saying!

The Bottom Line

For investors looking at Delta Air Lines today, the key question is whether the current P/E still offers enough cushion if demand or costs move against expectations. The stock screens as undervalued on market multiples, and the broader valuation checks lean supportive rather than stretched. From here, the debate largely hinges on whether Delta can sustain its pricing power and protect margins from fuel and labor pressures, which will decide if the current discount signals opportunity or simply reflects those ongoing risks.

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.