Are U.S. airline stocks primed for another rally?

UBS analysts are tempering expectations for a strong second-half rally in U.S. airline stocks, citing significantly higher valuations (now ~10x vs. 6.5x last year), uncertain industry demand, and the absence of tailwinds like falling fuel costs. Despite supply discipline being a positive, UBS projects subdued revenue growth of 1.2% in Q3 and 1.4% in Q4, a notable slowdown from 4.3% in Q4 2024, limiting near-term upside. The firm advises patience and a selective approach, favoring Delta and United, with a better sector setup anticipated only in 1H 2026.

Analysis

UBS analysts have adopted a cautious stance on the U.S. airline sector for the second half of the year, questioning the likelihood of a rally comparable to the surge in 2024. The primary headwinds identified are a significant expansion in valuations, with the sector average multiple rising from 6.5x last year to approximately 10x currently, and the absence of prior tailwinds such as falling fuel costs. This valuation re-rating raises the bar for further stock appreciation. Furthermore, UBS projects a material deceleration in revenue growth to just 1.2% in Q3 and 1.4% in Q4, a stark contrast to the 4.3% growth recorded in Q4'24, as airlines face tougher year-over-year comparisons and uncertain demand. A key mitigating factor is supply discipline, evidenced by flat year-on-year domestic available seat mile (ASM) growth for Q3 and a 0.2% reduction in seat counts, which is viewed as supportive for the industry. However, without an upside surprise to revenue estimates, significant near-term upside is considered limited. UBS views the setup for the sector as more favorable in the first half of 2026, contingent on continued supply discipline.

Key Decisions for Investors

• Investors should exercise patience and maintain a selective approach, as demanding valuations at ~10x and slowing revenue growth limit the potential for a broad-based sector rally in the near term.
• For sector exposure, consider overweighting industry leaders Delta (DAL) and United (UAL), which UBS identifies as the preferred vehicles despite the cautious overall outlook.
• Monitor industry demand and revenue metrics closely, as any performance exceeding the subdued growth forecasts of 1.2% for Q3 and 1.4% for Q4 would be a key catalyst for a potential re-rating.
• Given the limited near-term upside, investors may consider positioning for a more favorable setup in the first half of 2026, when UBS anticipates a better risk-reward profile for the sector.