1. Go to Settings.
2. Select the Shippings.
3. Click on the + Add Shipping Zone button.
4. Fill up the Zone Name, Country and States.
5. Then, choose the Flat Rate Per Order method.
6. Fill in the information for Shipping Method Name, Courier Company and Per Order Rate.
7. Moreover, you may choose to have the additional settings. (optional)
8. Once complete the setting on the shipping rate, click on the Add button at the top-right.
9. Then, the Flat Rate Per Order shipping method will be created.
10. Whenever the customer checkout the order, the Flat Rate shipping method will be available.