Fuel Guided at $3.15, Jet Spot Averaged $3.82 (Delta Earnings Preview, 9 October 2026): What to Expect — and Why the Fuel Line Decides the Quarter

Delta Air Lines reports September-quarter results before the US open on Thursday, 9 October 2026. In July it guided adjusted EPS of $2.00 to $2.50 on an all-in fuel price of about $3.15 a gallon; Gulf Coast jet fuel then averaged about $3.82 on spot alone, and consensus has slid to roughly $1.88 — below the guided range. Demand is not the open question. The release is a measurement of how much of a fuel shock an airline can pass through fares within a single quarter.

When Delta reports, and why it goes first

Delta is scheduled to release September-quarter 2026 results before the market opens on Thursday, 9 October, with its earnings call that morning. As in most quarters, it is the first of the big US network carriers to report, which makes it the opening data point for the airline group.

This quarter the timing carries more weight than usual. Brent crude averaged about $114 a barrel in September on EIA data, with a daily high near $121 on 24 September, after the Hormuz standoff re-escalated (see the late-September oil move). Delta is the first large company in the most fuel-exposed corner of the US market to report a full quarter of it.

What Delta guided in July — and what it assumed

Delta's June-quarter release on 10 July set out the September-quarter outlook and affirmed the full year:

The key sentence is in the footnote. The guidance "assumes fuel at the forward curve as of July 2, 2026", including a 5-cent refinery benefit. On 2 July, US Gulf Coast jet fuel spot stood at $2.71 a gallon and Brent at $68.53, a moment of relative calm between two oil spikes. A guide built on that curve was a guide built on calm.

Delta had also just come through a quarter that showed how large the swings are. In the June quarter its adjusted fuel bill was $4.4bn, up 77%, at $3.93 a gallon — "the highest quarterly fuel expense in our history", in chief executive Ed Bastian's words in the release — and the company still produced $1.56 of adjusted EPS.

The fuel arithmetic: what the quarter actually charged

Here is what the jet-fuel benchmark did after 2 July, from EIA's daily US Gulf Coast kerosene-type jet fuel series:

Spot is not what Delta pays. Its all-in price adds taxes, transport and into-plane costs and nets the refinery benefit, which is why it ran about 13 cents above Gulf spot in the third quarter of 2025 ($2.25 against $2.12) and about 30 cents above it in the second quarter of 2026 ($3.93 against $3.63, a quarter that included a refinery outage). The guided $3.15 sits below the $3.82 spot average before any of those additions are counted.

The scale follows from Delta's own numbers. A $4.4bn fuel bill at $3.93 a gallon implies roughly 1.1 billion gallons a quarter, so every 10 cents a gallon is about $110m to $115m of quarterly cost. A gap of several tens of cents between the assumed and the realised price therefore runs to hundreds of millions of dollars of pre-tax income — a large number against a quarter in which Delta earned $1.5bn of adjusted pre-tax profit a year earlier.

That is the arithmetic behind the consensus drift from $2.11 to $1.88. It is also why the spread between consensus averages matters: aggregates still showing figures above $2 are largely carrying estimates written before September's move.

The two offsets: fares and the refinery

Fuel is only half of the equation. Two mechanisms work against it.

Fare recovery. Airlines respond to fuel spikes by raising fares and trimming capacity, but tickets for the quarter are partly sold in advance, so pass-through lags. Delta entered the quarter with momentum: June-quarter revenue grew 14% to a record $17.7bn adjusted on about 1% more capacity, unit revenue (TRASM) rose 12.4%, and premium revenue grew 17%. Chief commercial officer Joe Esposito said in July that he expected September-quarter unit revenue growth to improve sequentially. The unit-revenue figure on Thursday is the direct measure of how much of the fuel move reached the fare.

The refinery. Delta owns a refinery in Trainer, Pennsylvania, through its Monroe Energy subsidiary. When jet fuel rises faster than crude — a wider crack spread — the refinery earns more, partly offsetting the airline's bill. That is exactly what happened in the quarter: on the EIA figures above, the Gulf Coast jet crack (jet price × 42 minus Brent) widened from roughly $50 a barrel in the second quarter to about $64 in the third. The guidance assumed a 5-cent benefit. How far the realised benefit differs from that is one of the cleanest new numbers in the release.

Three scenarios for Thursday

These are maps of what each outcome would mean, not forecasts of which will occur.

1. Fares and refinery absorb most of the fuel move. EPS lands inside the original $2.00 to $2.50 range, with strong unit revenue and a refinery benefit well above 5 cents. The read-through would be that a premium-heavy airline can pass a fuel shock to customers within a quarter — evidence on the "who pays" question that matters for inflation, not just for airlines.

2. Partial recovery, in line with the reset consensus. EPS near the high-$1s, margin below 11%, unit revenue solid but not enough to cover fuel. Here the information is mostly in the outlook: what fuel price Delta assumes for the December quarter, and whether the full-year $6.50 to $7.50 range survives.

3. Fuel overwhelms the fare response. EPS below the consensus range, a margin well under the guide and a full-year cut. The read-through would be to the rest of the airline group still to report, and to the broader question of whether energy costs are starting to compress margins outside the energy sector.

In every case the December-quarter guide is where the forward information sits. Its fuel assumption will reveal what the forward curve looked like when it was set, and with September jet averaging $4.37 that assumption alone will reset estimates for the quarter now under way.

Where this touches what you trade

US500 and the cost-pass-through question. Delta is a small weight in the S&P 500, so its direct index impact is limited. Its value is as a test case. The index's earnings yield has caught up with the 10-year Treasury, which leaves earnings rather than the multiple carrying the market (see the S&P 500 earnings-yield note). An energy shock that companies cannot pass on erodes exactly that support; one they can pass on feeds inflation instead. Delta reports on which of the two is happening in one of the most fuel-intensive industries.

Oil and the Canadian dollar. The jet-fuel spike is a refined-product version of the crude move that drives commodity currencies. Higher oil supports the terms of trade of producers such as Canada, one reason the Canadian dollar responds to the same Hormuz headlines that raise Delta's costs; commodities are one of the five factors the meter scores across eight currencies.

Rates and the dollar. If pass-through is strong, airfares feed CPI — airline fares are a line in the index — and inflation expectations, the channel into Treasury yields and the US dollar. One airline's fares are not the CPI, but Delta's commentary on pricing power is a first read on that link.

The line to take into Thursday: demand is not the question Delta's numbers answer this time. The fuel price per gallon, the refinery benefit and unit revenue together say who paid for September's oil spike.

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Educational macro context only — not investment advice.