If UPS shipping methods are not showing up at checkout, there are several possible causes. Some of the most common issues are as follows...
UPS Account Information
Review the UPS Integration settings at [Admin > Integrations with 3rd-Party Services > UPS Shipping Tools]. If any of the required options (UPS Access Key, UPS Developer's Account Name, and UPS Developer's Account Password) contain incomplete or inaccurate information, the shopping cart may be unable to connect to the UPS servers to obtain shipping rates.
No active UPS shipping methods
Review the active shipping methods at [Shipping > Search Shipping Methods]. If all of the shipping methods with the UPS type are inactive, the shopping cart will not be able to display any UPS shipping rates in the storefront.
Current order is not eligible for any of the active UPS shipping methods
Review each active UPS shipping method in the Shipping Method Editor. The options in the Limits and Display Zones sections may prevent the shipping method from being displayed in the storefront.
A shipping method has the High Display Threshold option in the Limits section set to 5 Quantity, and there are six products in the current order. Since the current order exceeds the shipping method's High Display Threshold value, that shipping method will not be displayed in the storefront for the current order.
No shipped products in the basket
Shipping information is only displayed at checkout if the current order contains at least one product that requires shipping. Confirm that at least one product in the order has the Requires Shipping? toggle set to YES in the Shipping & Fees section of the Product Editor.
No active UPS shipping methods associated with product's dropshipper
For each product in the current order, check the status of the Location this Product Ships From and This product may only be shipped by the following methods options in the Shipping & Fees section of the Product Editor.
If the Location this Product Ships From dropdown menu has a dropshipper selected, review that dropshipper in the Dropshipper Editor to confirm that the desired UPS shipping methods are selected in the Shipping Methods section.
If the This product may only be shipped by the following methods dropdown menu is set to Only the ship methods selected below..., confirm that in the Shipping Method list below the dropdown menu, the desired UPS shipping methods are selected (as indicated by a checkbox that contains a checkmark).
"Ship From" address
If the "Ship From" address is incomplete, the UPS servers may be unable to return shipping rates. The "Ship From" address is determined by the Location this Product Ships From setting for each product in the current order. The Location this Product Ships From option is in the Shipping & Fees section of the Product Editor
"Ship To" address
If the "Ship To" address is incomplete, the UPS servers may be unable to return shipping rates. The "Ship To" address is entered in the Shipping Address fields of the checkout page.
Additionally, UPS does not ship to PO Boxes, and so if the current order has a PO Box as the "Ship To" address, the UPS servers may refuse to return shipping rates.
Shipment does not meet UPS requirements
There are many reasons that a shipment might not meet UPS requirements, two of the most common are the following:
The total weight or dimensions of the products in the order exceed the limits for the active UPS shipping rates.
An international "Ship To" address has been entered, but none of the international UPS shipping methods are active.