The Heathrow third runway debate has quickly turned into more than an infrastructure story; it is now a live risk and opportunity filter for airlines with meaningful exposure to the airport. With concerns over a £33b project, competing expansion plans, and open government signals on lower cost bids, the winners and losers may not be obvious at first glance. This article picks out 3 airline stocks from our screener that appear most directly exposed to the latest Heathrow news, and explains how the shifting plans could either support or strain their long term growth plans and profitability.

DiDi Global (DIDI.Y)

Overview: DiDi Global runs a large app based mobility platform, offering ride hailing, chauffeur and hitch services, plus bike and e-bike sharing, food delivery, payments and vehicle services across China, Brazil, Mexico and other international markets.

Operations: DiDi Global generates most of its revenue from China Mobility at about CN¥206.1b, with smaller contributions from International at around CN¥16.2b and Other Initiatives at roughly CN¥9.8b.

Market Cap: US$15.3b

Investors looking at DiDi Global in the context of global mobility trends may find an unusual mix of scale, expectations and risk. The stock trades on a low P/S multiple relative to some peers. At the same time, recent quarterly results show a shift back to losses and the company relies heavily on external funding, so execution on cost control and financing remains critical. In addition, there are governance questions, with limited board independence, creating a complex story where potential rewards and funding and regulatory risks are closely connected.

DiDi Global’s scale and low P/S multiple could be masking a very different risk return profile than investors assume. For the full context, see the DiDi Global financial health report

ArcBest (ARCB)

Overview: ArcBest is an integrated logistics company that helps businesses move freight by road, air, and ocean, combining its own less than truckload network with asset light brokerage, expedited shipping, warehousing, and managed transportation services worldwide.

Operations: ArcBest generates about US$2.7b of revenue from its Asset Based LTL operations and roughly US$1.4b from its Asset Light segment, with other items and eliminations reducing the total by around US$0.1b.

Market Cap: US$3.3b

ArcBest provides exposure to the same global freight and capacity themes that influence airline supply chains, but through trucking, brokerage, and logistics software rather than passenger traffic. The company is emphasizing technology, including AI driven optimization and digital pricing, to seek more earnings from each shipment. Margins are currently thin at 1.4%, and recent earnings have been volatile, with a reported loss in Q1 2026. In addition, higher risk external funding, leadership changes, and a high P/E create a profile where potential efficiency and volume drivers exist alongside meaningful execution and pricing pressure risks.

ArcBest’s thin 1.4% margin and high P/E could be masking where the real earnings power sits in its freight and logistics mix, and the analysis report for ArcBest may highlight a pressure point investors are overlooking

Landstar System (LSTR)

Overview: Landstar System provides transportation management solutions, coordinating truckload and less than truckload movements, rail, air and ocean freight, and specialized heavy haul and hazardous materials shipments, while also offering insurance and risk management services for its network of independent contractors.

Operations: Landstar System generates most of its revenue from Transportation Logistics at about US$4.7b, with Insurance contributing roughly US$129.3m and internal revenue eliminations reducing the total by around US$57.4m.

Market Cap: US$7.1b

Landstar System provides exposure to freight flows that sit alongside airline cargo and passenger travel, including time critical shipments and cross border trade that often moves through major hubs like Heathrow. The company’s asset light model and safety focus have supported earnings quality, dividends and share buybacks, but the stock trades on a relatively high P/E and has experienced declining earnings and softer revenue trends over recent years. Rising insurance costs, customer concentration and competition from digital brokers present additional considerations. For investors watching how Heathrow capacity plans affect global supply chains, a key area of focus for Landstar is how its freight mix, pricing power and funding profile respond if air related volumes shift or become more uneven.

Landstar System’s asset light model and steady capital returns suggest that the real story may sit behind the headline P/E. To see how its freight mix, pricing power and risk profile fit together, review the 2 key rewards and 1 important warning sign

The 3 stocks here are a useful starting point, but they are only a slice of the full picture, with our airline idea screener surfacing 22 more companies with equally compelling stories that tie into capacity, funding and airport infrastructure themes. To identify the highest conviction plays for your watchlist, use Simply Wall St to filter the Airline Industry Stocks screener by the specific catalysts and narratives that matter most to you.

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Seeking Alternatives Beyond Heathrow Headlines?

Fresh ideas do not wait. While attention is caught on Heathrow, other stocks may be building momentum or quietly dropping to attractive levels under the radar for now, act now.

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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.