Microsoft released a limited, free version of the game. Think of it as a "trial zone." To get this official gratis link:
What do you get for free?
This "gratis link" is safe, fast, and legal. You can explore the stunning graphics and see if your PC can run the game.
If the demo is too limiting and you don't want a subscription, there is a trick to get the full Microsoft Flight Simulator 2020 Standard Edition for just $1 if you act fast.
However, the best "almost gratis" link is:
Go to cdkeys.com or Green Man Gaming (legitimate key resellers). They sometimes sell MSFS 2020 Standard Edition for $24.99 – that's less than 50% of retail. This is not free, but it's a one-time payment for a 200GB+ game.
Q: Can I download MSFS 2020 for free using a torrent?
A: Yes, but the torrent will be missing live weather, live traffic, and will likely contain malware. You will also be unable to download world updates (which are free but require an online Microsoft account). Strongly not recommended.
Q: Is there a portable version (USB stick) of MSFS 2020 for free?
A: No. The game requires installation through the Xbox or Steam app. Any "portable USB" version is a scam.
Q: My friend shared his account with me. Is that legal?
A: Account sharing violates Microsoft's Terms of Service. However, Microsoft Home Sharing allows you to play on two PCs simultaneously if the main account owns the game and sets one PC as the "home Xbox." This is a gray area but works for couples/families.
Q: What's the smallest free download that actually works?
A: The Microsoft Flight Simulator 2020 Free Trial (the official demo). It's still a 100GB download, but it's 100% safe. Search it on the Microsoft Store directly.
While personal prosecution is rare, downloading cracked software is illegal in most jurisdictions. Your ISP can flag torrent activity, and you expose yourself to DMCA notices.
Bottom line: There is no safe, working "gratis link" for the full PC game. But that doesn't mean you can't fly for free.