# Ariane 6: fourth Amazon Leo mission takes shape in Kourou, no date set yet

> LE-04 is the fourth of 18 launches under Arianespace's contract with Amazon. Trackers point to 7 October, but without an official window the date is only a guide.

- Published: 4 Oct 2026 (2026-10-04)
- Author: Stanislav Milchev, Editor
- Section: Launches
- Tags: Ariane 6, Amazon Leo, Arianespace, Avio, P160C
- Canonical URL: https://www.spacecapex.com/en/news/ariane-6-le-04-amazon-leo

Arianespace is preparing the fourth **Ariane 6** launch for Amazon's megaconstellation, mission **LE-04** **(Leo Europe 4)**. There is still no official date. Sites that track launch schedules point to 7 October as the earliest opportunity, but the status remains "TBD". Until Arianespace publishes its usual announcement with a launch window, I would treat that date as a guide rather than a promise.

The context, at least, is clear. The contract between Amazon and Arianespace covers 18 launches, and three have flown so far. LE-01 in February was the first flight of Ariane 64, the most powerful version of the rocket with four solid-fuel boosters, and carried 32 satellites. LE-02 repeated the feat at the end of April. Then in June, LE-03 used the new, more powerful P160C boosters for the first time and put up 36 satellites, the heaviest payload ever flown on an **Ariane** rocket. With that mission Arianespace reached 100 Amazon Leo satellites in less than five months.

![Ariane 6 LE-04 Sketch-selection](https://omlclbaklhdpibyhxubz.supabase.co/storage/v1/object/public/media/articles/1791111955271-4ucauw.png "SpaceCAPEX")

The P160C boosters are built by Italy's **Avio**, so every Amazon flight is also a small piece of good news for Rome's defence and space business. For Europe, though, the irony remains. The busiest customer of Europe's heavy rocket is an American company building a rival to Starlink.

For those who follow the numbers: the launch is from the ELA-4 pad in Kourou, French Guiana, flying north-east. If LE-04 repeats LE-03's configuration, the payload will be 36 satellites, but that has not yet been officially confirmed.

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Source: SpaceCAPEX — https://www.spacecapex.com/en/news/ariane-6-le-04-amazon-leo