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

https://displaytypefont.com/product/regionaire/

File Font Version : 

1. Regionaire.otf
2. Regionaire.ttf
3. Regionaire.woff
4. Regionaire Italic.otf
5. Regionaire Italic.ttf
6. Regionaire Italic.woff