IAG's Resilient Half Hides a Flat-Capacity, Fuel-Burdened Full Year

Flat capacity and fuel costs now matter more than a steady first half

The market has already shown that a tough first half by itself is not the issue. IAG now has to justify a year with capacity expected to be flat this year while absorbing roughly about 9 billion euros of jet fuel costs this year. With less scope to grow seat kilometers into weakness, investors are no longer underwriting an expansion story. They are underwriting whether margins can still hold up.

Why the bull case still exists

Bulls still have real evidence to lean on. IAG narrowly beat second-quarter profit estimates, management says it recovered about 60% of the fuel-cost increase through pricing and cost actions, and the group still targets a full-year operating margin of 12% to 15%. If demand holds and fuel behaves, the lower end of that range remains achievable.

Why the bear case is getting louder

Bears are focused on what weakened. Revenue growth slowed from 1.9% in the first quarter to 0.2% in the second quarter, and second-quarter operating profit fell to €1.406 billion from €1.68 billion a year earlier. Add the fact that IAG did not give specific projections for the annual profit forecast, and the setup looks less forgiving. With flat capacity, there is less room for error.

That is the real split in the debate: bulls see a squeezed but still fundable margin target, while bears see an airline defending results instead of growing into them.

What drove IAG's first-half resilience

The real question is not whether the first half looked steady. It is whether that steadiness came from repeatable operating work or from conditions that are now harder to reproduce.

The profit improvement was real, but narrow

IAG's first-half result was not a fiction. The group posted operating profit of €1.757 billion for the first six months while revenue rose 1.0%. More important, the result was not driven only by selling more seats. Passenger unit revenue increased by 8.2% at constant currency, and management said it recovered about 60% of the fuel-cost increase through pricing and cost actions. Nonfuel unit cost improvement improved by 0.9% year-on-year.

In other words, IAG did not need strong capacity growth to produce a respectable half. It got better pricing, protected yields where it could, and held part of the cost base.

Where the earnings power still looks credible

The clearest sign of lasting earning power is in the parts of the network with pricing leverage. British Airways Passenger Unit Revenue Growth: Increased by 8.5%, and Iberia Operating Margin: Over 9%, up 1.6 percentage points. Those numbers suggest some brands and routes still have more pricing power than others.

There are also balance-sheet safeguards. Net leverage at 0.5x and Net Debt: Reduced to EUR 4.2 billion give IAG more time to work through a difficult year than a weaker carrier would have.

Why repeatability is still the open question

The problem is that the recovery may be getting harder to sustain. Revenue growth fell from 1.9% in the first quarter to 0.2% in the second quarter. Second-quarter operating profit fell to €1.406 billion, and the operating margin dropped to 15.8% from 19.0% in the quarter. That is not a collapse, but it does suggest the easiest part of the recovery may already be behind the group.

Free cash flow could also come under pressure if the environment stays tough. CapEx Expectation: EUR 3.5 billion for the year is a meaningful commitment when yields slow and fuel stays expensive. So the next question is not whether the first half was resilient, but whether the second half can support the full-year target without more capacity leverage.

For IAG, the next rerating has to come from margin execution

With capacity expected to be flat this year and about 9 billion euros of jet fuel costs still weighing on the full year, IAG is not going to rerate on expansion stories. It will rerate only if the market believes it can still move toward its full-year operating-margin target of 12% to 15%.

That is a harder bar than delivering a resilient first half. Flat capacity removes the simple escape hatch of growing seat kilometers into weakness, leaving yield durability and cost control as the main drivers.

Why the stock could still work

There is at least one reason not to write off that path. IAG said around 70% hedged for the balance of 2026. If fuel markets cool even modestly, that hedge cushion can help the lower end of the margin target look more reachable.

The counterargument is just as clear. If capacity is flat, pricing gains have already gone some way toward offsetting cost inflation, and demand softens, there is little margin for error.

August is the next meaningful check-in

IAG normally reports its full year financial results in August, so that remains the next update that can materially change the stock's tone. Before then, investors will be looking for evidence that the first-half strength was not just early-year yield extraction.

My stance remains hold/watch. I would not chase the name on resilience alone. I would stay alert only if the August results show the margin target is still achievable without capacity growth.