Microsoft's upcoming Flight Simulator will be entering closed beta this July 30th. This comes from an announcement on July 9th from the developer Asobo Studios. Along with this announcement, they also released the next alpha build for select insiders this week.
Those who have alpha access to the game will automatically be entered into the closed beta. If you were not lucky enough to get into the alpha, the developers would be sending out invites to the closed beta to those who have signed up for the Insider Program over at the game's website.
If you do not know about Microsoft's next Flight Simulator game, you can check out the announcement trailer below. The game is extremely detailed and extensive, as you can fly across the world in different airplanes.