Delta's Q3 report to test if consumer spending can withstand rising fuel costs

Delta Air Lines is scheduled to announce its third-quarter earnings on Friday, with implications extending beyond whether the figures exceed analyst forecasts. The more important question, in my view, is whether passengers are still prepared to pay rates high enough to help the carrier cope with another spell of increased fuel expenses.

This situation has been unfolding for Delta throughout most of the current year. Tensions between the US and Iran have driven energy prices upward, and it comes as no surprise that airline companies rank among those feeling the greatest impact.

During the second quarter alone, Delta recorded a 77% year-over-year rise in adjusted fuel costs, reaching $4.4 billion, while the average fuel price climbed to $3.93 per gallon. Despite these headwinds, demand remained surprisingly strong. The carrier's adjusted revenue expanded by 14%, premium-class revenue surged 17%, and main cabin revenue rose 8%.

In simpler terms, Delta managed to achieve enough revenue growth to mitigate what could have been a considerably more severe blow from escalating energy prices.

However, that resilience now faces another examination.

For the third quarter, Delta initially projected adjusted earnings per share between $2.00 and $2.50, alongside revenue growth in the mid-teens percentage range. But Wall Street has lowered those expectations in anticipation of a more difficult period for airlines. The average analyst estimate currently stands at about $1.88 per share, with revenue forecast near $17.6 billion.

Yet the larger uncertainty centres on the outlook ahead.

Over the past two months, oil prices have risen substantially once more, with Brent crude recently trading above $100 a barrel. At the same time, tightening supplies of refined products are adding pressure in both diesel and jet-fuel markets.

Consequently, Delta's fourth-quarter guidance this week will attract considerable attention.

If travel demand stays robust enough for the airline to sustain pricing and defend its margins against higher fuel costs, that would provide further evidence that consumers — especially those in premium and business travel segments — still have capacity to spend.

Conversely, if Delta signals weaker bookings due to more price-conscious customers or renewed margin strain, that would point to a broader consumer narrative.

With this in view, I would focus not solely on whether Delta surpasses EPS estimates on Friday. The more valuable assessment is whether elevated fuel prices have finally reached a threshold where either the airline or its customers must make a sacrifice.