How can I automatically create faces in the gap between two curvy shapes?

[Jorge_Miguel]

Creating a cylinder and then removing the unnecessary isn’t an option because the not all the curves touch the cylinder and I don’t wanna cut more. Besides being time consuming.

[mihai.s]

Like this?

Use Selection Toys > Border Edges, and then Curviloft plugin

[Jorge_Miguel]

Worked perfect! Thanks a lot!