Amazon Leo's largest Arianespace launch yet will feature upgraded boosters to deploy more satellites

Key takeaways The upcoming LE-03 mission will see the heaviest payload ever launched by an Ariane rocket. It will deploy another 36 Amazon Leo satellites, adding to the 330+ satellites already in orbit. Upgraded P160C solid boosters developed by ArianeGroup increase rocket performance and enable four additional satellites per launch.

A successful LE-03 mission will mean Europe has launched more than 25% of Amazon’s growing constellation. The next Amazon Leo mission Leo Europe 3 (LE-03) is targeting Wednesday, June 17 at 7:53 a. m. ET / 11:53 a. m. UTC for launch from Europe's Spaceport in Kourou, French Guiana.

The mission will mark 100 Amazon Leo satellites launched by Arianespace, with three missions completed in less than five months. Amazon Leo successfully launches first heavy-lift mission of 2026 with Arianespace Amazon's first mission on Ariane 64 added another 32 Leo satellites to its growing constellation.

LE-03 will use Ariane 6's upgraded P160C solid boosters, enabling 36 satellites to be deployed—four more than the previous two Ariane 6 missions, which each deployed 32 satellites—and making it the largest payload launched to date for both Amazon Leo and Arianespace.

Upgraded boosters 36 Amazon Leo satellites arrive in French Guiana for launch on the LE-03 mission aboard Ariane 6 Photo by Arianespace The P160C boosters are an upgraded version of Ariane 6's P120C solid rocket boosters, developed by ArianeGroup.

They carry additional solid propellant and extend operating time, increasing Ariane 6's low Earth orbit payload performance by more than two metric tons. This enables heavier and more capable missions—and for Amazon Leo, it also means deploying more satellites per launch as the constellation scales.

"Increasing our payload capacity to 36 satellites per mission is the result of extensive engineering collaboration between our team and Arianespace. Every additional satellite we can safely deploy on a single launch accelerates the pace at which we scale our constellation and bring reliable connectivity to customers around the world.

The upgraded P160C boosters give us the performance margin to do that confidently, and we're already looking ahead to further optimizations as we continue building out Amazon Leo," said Melissa Wuerl, director of Launch Systems, Amazon Leo.

The development and production of these boosters take place in Europe, supporting the continent's space industrial base and reinforcing the role of European launch technology in the global space economy.

Contributing to the European space industry With an initial contract for 18 launches on Ariane 6, Amazon Leo remains the largest single customer for Arianespace, and the agreement represents a long-term commitment to Europe's space sector and the communities it supports.

Amazon Leo mission updates: 330+ satellites deployed following latest Atlas V launch Follow along for updates as Amazon Leo launches more than 100 missions to deploy its low Earth orbit satellite internet constellation. Oxford Economics estimates that Amazon Leo's spending in the EU will contribute €2. 8 billion to GDP.

It will support an average of 3,270 jobs annually over the same period, and the economic activity generated by launch partnerships is expected to contribute over €790 million to government treasuries in the EU.

Scaling deployment from Europe's spaceport Amazon Leo’s LE-02 mission lifts off from Europe’s Spaceport in French Guiana on April 30, 2026 Photo by Arianespace LE-03 also builds on the momentum of Amazon Leo's first year of production launches.

Since the first full-scale Amazon Leo deployment mission in April 2025, more than 330 satellites have been deployed across 12 missions and two continents. Amazon Leo uses a multi-provider launch strategy to deploy its constellation, with more than 100 launches secured across five different rockets—Atlas V, Ariane 6, Falcon 9, Vulcan Centaur, and New Glenn.

Arianespace is the sole European launch provider for Amazon Leo, playing a distinct role in the constellation deployment while directly supporting European space infrastructure and industry.

"The upgraded P160C boosters are bringing exactly the performance gains we designed them for, and LE-03 will be our most ambitious launch together yet," said David Cavaillolès, CEO of Arianespace. "This mission underscores the confidence Amazon Leo places in Ariane 6 and the dedication of the teams across Europe who contribute to its success."

Rocket boosters being transported to Arianespace facilities Photo by Arianespace Connecting communities worldwide Amazon Leo will provide fast, reliable internet to customers and communities beyond the reach of existing networks.

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