You can manage access to a flow or send a copy to one or more users. In Flow View, select ... > Share....

Types of Sharing

Manage Access Tab

Through this tab, you can invite one or more collaborators to the flow, so that you may work together on the same objects. 

Manage Access Tab

Send a Copy Tab

In this tab, you can create a copy of the current flow for one or more users. These flows are independent from the original.

Send a Copy Tab