Booking Holdings (BKNG) fell about 5.1% in morning trade to $171.13, against a 52-week high of $225, after the EU's General Court in Luxembourg threw out its challenge to the block on its €1.63bn (~$1.9bn) takeover of eTraveli. By early afternoon it was still down about 4.1% at $172.89, a roughly $130bn market cap.

What the court actually said

The European Commission killed this deal back in September 2023. Booking sued (case T-1139/23) and lost today. The judges' line: buying eTraveli, "Europe's leading online flight booking operator", would have strengthened Booking's already dominant position — over 60% of the European Economic Area hotel OTA market.

The theory is worth understanding, because it's the whole story. Flights are a low-margin doorway. Sell someone a ticket to Lisbon and you get a shot at selling them the hotel, where the real money is. The Commission called that reverse leveraging — using flights to feed an already-dominant hotel business. Booking offered to show rival hotel offers on its flight checkout page; the Commission said that was unenforceable, and the court agreed. Booking also argued the UK CMA and US FTC had waved the deal through. The court didn't care.

The number that makes this sting

Look at Booking's own Q2 2026: flight tickets grew just 4% year-on-year, while room nights rose 5%, gross bookings 9% and revenue 8%. Flights is the slowest leg of the business — and it's the exact leg the company wanted to buy its way out of. Now it has to build it organically, which Booking itself has called the more capital-intensive path. Marketing expense already grew 11% in Q2, faster than the 8% revenue growth. That gap is where an organic flights push shows up.

The other side of the trade: eTraveli stays with CVC, which bought it for €508m and had agreed to sell it to Booking for triple that. Its Gotogate and Mytrip brands keep the European flight funnel — and keep selling those customers to whoever pays, including Expedia, rather than handing them to Booking.

Separately, and don't confuse the two: Brent crossed $100 today for the first time since July on Middle East escalation, which pressured travel names broadly and dragged the S&P 500 down 0.48% at midday. That's a sector-wide headwind. The 5% gap-down is the court ruling.

The risk to this read: Booking's flights business may not need the acquisition at all. Watch the flight-tickets growth line in the next quarterly report — if it accelerates off that 4% without marketing spend outrunning revenue again, today's ruling costs shareholders far less than the drop implies.

As of 3:30pm ET / 1:00am IST, 9 Sep 2026. Sources: Investing.com, Reuters via Global Banking & Finance, Yahoo Finance, Booking Q2 2026 earnings call, Motley Fool. For discussion and education only — not investment advice. Verify before acting.