Amazon Leo is giving Europe’s Ariane 6 rocket an even bigger vote of confidence.

Amazon’s satellite internet project has ordered six additional Ariane 6 launches from Arianespace, expanding its existing commitment from 18 launches to 24. The new agreement extends what Arianespace describes as the largest commercial contract in its history, with the additional missions scheduled to begin in 2029 and continue through 2031.

The deal was announced during the International Space Summit in Paris on September 9, where Amazon Leo and Arianespace confirmed the expanded partnership. All 24 missions are planned to launch from Europe’s Spaceport in French Guiana using the Ariane 6, with the new flights using the four-booster Ariane 64 configuration.

Amazon Leo is adding six more Ariane 6 launches

Amazon originally signed its Arianespace agreement in 2022 as part of a much larger effort to secure launch capacity for its satellite constellation. At the time, the company committed to 18 Ariane 6 launches.

That number has now grown to 24.

The additional launches are particularly significant because Amazon Leo is building a large constellation that requires a steady stream of rockets rather than a handful of one-off missions. Arianespace has already become an important part of that deployment strategy, with three Ariane 6 missions carrying Amazon Leo satellites into orbit during 2026.

Those three missions have placed 100 Amazon Leo satellites into orbit in less than five months.

The latest of them, the Leo Europe 3 mission launched on June 17, carried 36 satellites aboard an Ariane 64 equipped with upgraded P160C solid rocket boosters. It was the largest Amazon Leo launch so far and represented the heaviest commercial payload ever launched on a European rocket.

The upgraded boosters also increased Ariane 64’s payload capacity by up to two metric tons, giving Amazon and Arianespace more room to increase the number of satellites carried on individual missions as the constellation expands.

Ariane 6 is becoming a bigger part of Amazon Leo’s launch strategy

Amazon isn’t relying on a single rocket to build Amazon Leo. The company has secured more than 100 launches across multiple launch providers as it works toward deploying its first-generation constellation.

That makes Arianespace’s role particularly interesting. Amazon now has enough confidence in Ariane 6 to add another six missions to an already substantial commitment, giving the European launcher a reliable long-term customer while Amazon gets additional launch capacity for its rapidly expanding satellite network.

Chris Weber, Amazon Leo’s vice president of business and product, said Europe’s launch infrastructure has become part of the operational architecture of the constellation. Amazon’s decision to increase its commitment from 18 to 24 launches, he said, reflects its confidence in Ariane 6 and its continued investment in European launch capability.

For Arianespace, that’s a pretty important endorsement.

Ariane 6 is still building its commercial track record after years of development delays, and securing long-term orders is crucial if Europe wants to increase the rocket’s production and launch cadence. The company said the additional Amazon missions provide greater visibility as it ramps up Ariane 6 operations and expands its ability to serve both commercial customers and European institutional missions.

Amazon Leo is approaching 400 satellites

The expanded launch agreement comes as Amazon Leo’s constellation continues to grow.

Amazon says it has completed 14 missions since full-scale deployment began in April 2025, putting nearly 400 satellites into orbit. The company describes Amazon Leo as the third-largest satellite constellation currently in operation, with the network intended to provide fast internet connectivity to customers and communities that aren’t well served by existing broadband infrastructure.

Amazon is preparing for an initial service rollout this year, with plans to expand coverage globally as the constellation gains more satellites and capacity.

That means the company needs to keep launches coming. Lots of them.

And that’s where having a long-term relationship with multiple launch providers becomes useful. Arianespace can provide European launch capacity while Amazon continues using other rockets to deploy satellites from different launch sites.

For Ariane 6, meanwhile, Amazon’s decision to increase its order from 18 to 24 launches is more than just another customer contract. It gives Europe’s newest heavy-lift rocket a substantial commercial workload extending into the next decade.

Amazon Leo needs rockets. Ariane 6 needs customers.

Right now, the two appear to be getting exactly what they want from each other.