Why airfare could rise even more, but airline profits won't

Jet fuel prices have surged amid Strait of Hormuz disruptions and Iran-related uncertainty, while resilient travel demand has allowed airlines to pass higher costs through: U.S. airfares rose 23.4% year over year in August, and Thanksgiving and Christmas round-trip fares were up 31% to $402 and 23% to $452, respectively. Despite forecast double-digit third-quarter revenue growth, analysts have cut U.S. carrier profit estimates; American forecast an adjusted third-quarter loss of $0.10–$0.70 per share and lowered its 2026 profit outlook. Analysts expect airlines to curb capacity or reduce fourth-quarter earnings outlooks if jet fuel remains at $4–$4.50 per gallon.

Analysis

The key risk is a margin squeeze masked by strong nominal revenue: when jet-fuel cracks outrun crude, fare increases must cover the refined-product shock, not just headline oil. Holiday inelasticity helps near-term pricing, but early bookings may pull demand forward and leave weaker shoulder-season load factors. Premium-cabin mix can protect unit revenue, yet converting coach seats into premium inventory only works if premium demand holds; it does not eliminate fuel exposure.

Capacity is the swing factor. If fuel remains around the cited $4–$4.50/gal range, cuts can support fares, but also impair network utility and constrain growth. If fuel retreats, aggressive schedule additions—particularly at AAL and UAL—could reintroduce fare competition before demand absorbs seats. Spirit’s exit helps incumbents only while capacity remains disciplined.

DAL’s refinery offers a potential relative buffer, not a full hedge: refining economics and airline fuel consumption need not offset one-for-one. The market may overread fare growth as proof of durable earnings power; earnings and guidance should establish whether unit revenue is actually outrunning unit cost. Over the next 1–3 months, watch Q4 outlook, capacity plans, and jet-fuel cracks. Over 6–18 months, the central question is whether premium mix and disciplined supply persist after fuel eases.

Key Decisions for Investors

• Use DAL’s earnings and Q4 guidance as the near-term catalyst; avoid adding broad airline exposure until management demonstrates that unit revenue is keeping pace with fuel and other unit costs.
• Consider a relative-value long DAL / short AAL position only if DAL confirms better earnings resilience while AAL maintains aggressive capacity or cuts its outlook further. Keep sizing modest: DAL’s refinery is a partial, unquantified offset, and valuation data are not provided.
• Treat UAL’s scheduled capacity growth as a watch item, not an automatic short: look for evidence that added seats are pressuring unit revenue or forcing fare discounting before positioning against it.
• Falsify the capacity-squeeze thesis if jet fuel sustains below roughly $4/gal and carriers accelerate schedules without weakening unit revenue. Conversely, persistent fuel near or above $4.50/gal alongside reduced guidance would strengthen the case for favoring the most resilient operators over the sector.