Booking lost the Etraveli appeal. What does it mean for travel marketplace strategy?

What did the EU General Court decide on 9 September 2026?

The General Court dismissed Booking Holdings' challenge to the European Commission's 2023 decision blocking its proposed €1.63 billion acquisition of Etraveli Group. Etraveli is a specialist in online flight booking and also operates airline-integration technology through TripStack. Booking already had a leading hotel OTA position in Europe and wanted to add greater control over flights as part of its connected-trip strategy.

The Court accepted the Commission's conclusion that the acquisition could strengthen Booking's existing position in hotel online travel agencies by making flights a more powerful customer-acquisition and cross-sell channel. Importantly, the Court said merger analysis can consider newer forms of competition concerns in digital markets, including what it described as reverse leveraging: using a non-dominant position in one market to reinforce dominance in another.

This article looks at the commercial implications for travel businesses. It is not legal advice on how a future transaction would be assessed.

• Case: T-1139/23, Booking Holdings v Commission.
• Judgment delivered: 9 September 2026.
• The Court upheld the prohibition and rejected Booking's challenge.
• Booking said it disagreed with the outcome and was reviewing a possible appeal to the Court of Justice of the European Union.

Why were flights strategically important to a hotel OTA?

The Court's reasoning is useful because it treats a travel category as more than its standalone revenue or market share. The judgment says Booking's connected-trip strategy uses flights as part of a broader effort to acquire customers and increase loyalty, with hotel cross-sell following from that relationship.

The Court also noted that flights were one of the few customer-acquisition channels for hotels that Booking did not already dominate. That means the strategic value of a flight product cannot be judged only by flight margin. Its value also sits in customer acquisition, repeat usage, first-party data, cross-sell opportunity and the ability to keep the traveller inside one ecosystem.

This is familiar in travel. A lower-margin category can be commercially valuable when it brings a customer into the system and improves the economics of another category. The same principle can apply to experiences, transfers, insurance, dining, loyalty, payments and other adjacent products.

What does the ruling say about travel marketplace strategy?

The strongest commercial lesson is that category strategy and distribution strategy are inseparable. A marketplace adding flights, hotels, experiences or ground transport is also changing how it acquires customers, which journeys it can own, which suppliers become strategically important and where network effects can build.

That creates a different way to assess a new category. Start with the role the category plays in the whole customer and commercial system. Is it expected to make money directly, lower acquisition cost, increase frequency, improve conversion in another category, strengthen loyalty, create better data or make the proposition harder to replicate? Those objectives lead to different investment and operating choices.

A marketplace can therefore justify a category with modest standalone economics if the measurable portfolio effect is strong. The required discipline is to quantify that portfolio effect rather than relying on a broad one-stop-shop narrative.

Why partnerships and APIs may matter more after this ruling

Booking's commercial relationship with Etraveli continued after the acquisition was blocked. In June 2025, Booking and Etraveli announced an eight-year extension of their partnership, with Etraveli continuing to support Booking.com's global flights offering. This is a practical reminder that ownership is only one route to capability.

For many travel businesses, the relevant decision is build, buy or partner. Ownership can provide control, economics and strategic alignment. A partnership can provide faster access to specialist capability, lower capital commitment and a cleaner path to testing demand. API connectivity can make that partnership operational at scale if commercial rules, content, servicing and failure states are well designed.

The highest-leverage question is therefore not simply whether an adjacent capability should be acquired. It is which level of control the business actually needs to achieve the customer and commercial objective.

How should a travel business evaluate build, buy or partner?

I would assess the decision across six areas. First, define the customer job and how the new category changes the proposition. Second, quantify the standalone economics and the portfolio economics, including acquisition, cross-sell, repeat behaviour and servicing. Third, identify the capabilities that genuinely require control. Fourth, assess the supplier and technology dependencies. Fifth, decide what data and customer relationship rights matter. Sixth, model the path from pilot to scale.

A conservative approach partners for the new capability and keeps investment limited until demand and portfolio effects are proven. A balanced approach combines a strategic partnership with stronger integration, data rights and operating ownership. An aggressive approach acquires or builds the capability when control itself is central to the economics or customer proposition.

For most emerging travel marketplaces, the balanced path is the stronger starting point. It creates enough control to design the experience and commercial rules while preserving capital and allowing the proposition to be tested before a larger commitment.

The operating model matters as much as the transaction structure

A connected travel proposition still has to work operationally. Adding a category creates decisions around supplier selection, mapping, pricing, eligibility, payment, booking confirmation, cancellations, changes, refunds and customer support. If those decisions are fragmented across suppliers and systems, the customer sees one marketplace while the business operates several disconnected ones.

This is where marketplace strategy becomes operating-model design. The Travel Spark Solution Lab is built around the same problem: supplier activation, offer selection, pricing, booking, B2B distribution and recovery need explicit commercial rules and accountable ownership. A partnership model only works when those rules are clear enough for technology and operations to execute consistently.

The practical objective is a marketplace that can change suppliers or interfaces without rebuilding the commercial logic each time.

What should travel leaders take from the Booking-Etraveli ruling?

For CEOs, founders, boards and investors, the useful takeaway is that adjacent travel categories can have strategic value far beyond their direct margin. Flights can acquire hotel customers. Experiences can increase trip value and engagement. Payments can improve conversion and economics. Loyalty can change repeat behaviour. Supplier technology can alter the speed at which new products are launched.

Those effects should be visible in the business case. Measure customer acquisition cost, attach rate, cross-category conversion, contribution, repeat rate, servicing effort, supplier concentration and the operational cost of integration. Then decide whether the required capability should be owned, built internally or obtained through a partner.

The ruling does not prescribe one commercial model for travel companies. It does underline why ecosystem design, customer acquisition and category adjacency belong in the same strategic discussion.

Why did the EU block Booking's acquisition of Etraveli?

The European Commission concluded that the acquisition would strengthen Booking's already dominant position in hotel online travel agencies by using flights as an additional customer-acquisition and cross-sell channel. On 9 September 2026, the EU General Court upheld that prohibition.

What is reverse leveraging in the Booking-Etraveli case?

In this case, reverse leveraging refers to using a non-dominant position in one market, online flight travel agencies, to strengthen an already dominant position in another market, hotel online travel agencies. The General Court accepted that this type of competition concern can be considered in merger analysis.

Does Booking still work with Etraveli?

Yes. Booking.com and Etraveli extended their commercial partnership for eight years in June 2025. Etraveli continues to support Booking.com's flights offering even though the proposed acquisition was prohibited.

Should a travel marketplace build, buy or partner for a new category?

The decision should reflect the customer objective, standalone and portfolio economics, required level of control, supplier and technology dependencies, data rights and the path to scale. A partnership is often a strong way to test an adjacent category before committing significant capital.

How should a travel business measure the value of an adjacent category?

Measure the category's direct contribution alongside customer-acquisition cost, attach rate, cross-category conversion, repeat behaviour, servicing cost, supplier concentration and the effect on the economics of the wider customer relationship.