Beginning with version 12.0.3, merchants can display shipping transit times on their checkout pages. These transit times come directly from the carriers (UPS, FedEx, & USPS) and will appear for shoppers when they select their desired shipping method.
To enable the function on your store:
Log into your Shift4Shop Online Store Manager.
Using the left navigation menu, go to Settings > Shipping. (If you're using the "Lite" version of the admin, click on Shop followed by Shipping.)
On the Shipping Page, click on the Edit Settings button located under Shipping Settings.
Next, look for the "General Settings" section (you may need to click it to expand its view).
Place a mark in the Display Time in Transit checkbox.
Click Save at the top right.
Your carriers will now display transit times as shown in the image.