https://wccftech.com/microsoft-final-alpha-closed-beta-dates/

The new Microsoft Flight Simulator still doesn’t have a full release date, but it seems the game be preparing for touchdown, as the game’s final alpha and closed beta will be happening this month!

The fifth and final Microsoft Flight Simulator alpha is scheduled to arrive on July 9, which is also when the game’s developers plan to announce the launch date of the game’s closed beta. While we have to wait a bit for a specific date, it’s expected the beta will kick off sometime this month! If you'd like to get in on the beta, you'll have to sign up to be a Microsoft Flight Simulator Insider.