Air France-KLM: A Merger of Rivals That Never Fully Merged

On 4 May 2004, Air France and KLM completed what was then Europe’s largest airline merger. Yet more than two decades later, KLM still flies its own blue colours out of Amsterdam Schiphol, still uses its own KL flight numbers, and is still widely seen in the Netherlands as a Dutch airline. Why didn’t the merger actually merge the two?

A share swap, not a takeover

The deal was built to avoid looking like a French takeover of a Dutch national symbol. Instead of paying cash, Air France offered 11 of its shares for every 10 KLM shares, so KLM shareholders ended up owning about 19% of the combined group rather than simply being bought out. Air France, meanwhile, moved its own flying into a subsidiary and turned itself into the holding company for the new group. IAG used the same pattern for British Airways and Iberia seven years later.

What the ownership split actually looked like

After the shareholders’ meeting in September 2004 that set up the structure, the new holding company owned 100% of Air France’s capital and votes. Of KLM, though, it held only 49% of the votes, alongside 96.3% of the economic rights. That deliberate imbalance kept Dutch board control over KLM’s own operations even though the money was fully combined. The French state’s stake fell from 54% of Air France alone to about 44% of the combined group, still comfortably the biggest single shareholding.

Two hubs, deliberately kept separate

Like IAG later, Air France-KLM runs two fully separate long-haul hubs instead of merging onto one: Paris Charles de Gaulle for Air France and Amsterdam Schiphol for KLM. The two hubs draw on overlapping parts of Europe. A passenger connecting from southern Europe to North America could easily go through either. So the group can win connecting traffic under two brands, depending on which routing, schedule or price each passenger prefers, instead of pushing it all through one funnel.

What the numbers actually show — and where the strain is

On paper, 2025 was a record year for the group. Revenue rose 4.9% to €33 billion, operating profit topped €2 billion for the first time (up €400 million on 2024), and the group carried 102.8 million passengers, 5% more than the year before. But split the two national airlines apart and the “merger of equals” label looks more like politeness than description. Air France’s revenue rose 5.3% to €20.2 billion, and its operating result rose €382 million to €1.4 billion. KLM, in the same year, made an operating result of only €416 million on €13.2 billion of revenue: a margin of just 3.2%, about half of Air France’s.

That gap has specific, well-documented causes on the Dutch side. KLM has been squeezed by rising Schiphol airport charges, a lasting shortage of flight crew, tense relations with its pilots’ unions, and technical problems with its fleet that have led to delayed maintenance and cancelled flights. French aviation press now calls KLM the group’s “vulnerable link”, under cost pressure at home and facing infrastructure limits at Schiphol that Air France’s Paris operation doesn’t face to the same degree. It shows exactly the risk the 2004 ownership structure was designed to manage. Two airlines under one holding company can still drift far apart in performance. And the voting structure that protects KLM’s board independence also means Paris can’t simply impose an Air France-style turnaround on Amsterdam.

The pattern across three groups

Air France-KLM, IAG and Lufthansa Group have very different histories, but they’ve arrived at the same structure. A holding company sits above several national airlines. Each keeps its own colours, its own licence to fly and usually its own hub. The real merging happens in buying, back-office systems and shared loyalty schemes, not in what customers see. European aviation settled on this model because full single-brand mergers kept destroying the national loyalty and slot rights that make a European flag carrier valuable in the first place.

Sources & Further Reading

• Air France-KLM Reference Document — SEC filing ↗
• 18 years on from the merger of Air France and KLM — AeroTime ↗
• Star Alliance — Wikipedia (SAS departure) ↗
• Air France-KLM to take majority stake in SAS — Airways Magazine ↗
• KLM Group Annual Results 2025 — Official KLM newsroom ↗
• Air France-KLM FY2025 Results — Investing.com ↗