If you want the full version and license for commercial use,
you can purchase here :

https://staircaselab.com/product/flatland/

File Font Version : 

1. Flatland.otf
2. Flatland.ttf
3. Flatland.woff
4. Flatland Swash.otf
5. Flatland Swash.ttf
6. Flatland Swash.woff