Microsoft Flight (2012) was a dedicated free-to-play spin-off. While its official multiplayer servers were shut down in 2014, the core single-player experience remained available as a free download for some time, though it is no longer officially supported. Free Content Updates
New users can often find promotional trials, such as a 14-day trial for $1 or even free codes bundled with hardware purchases (like ASUS or MSI laptops). Microsoft Flight Simulator gratuito
If you are looking for a simulation that is truly $0, consider these options: Microsoft Flight Simulator - Xbox.com Microsoft Flight Simulator gratuito