For UPS, Las Palmas and Santa Cruz de Tenerife will be represented by Canary Islands country

added missing constants

Author: tristanhofman

app/code/Magento/Shipping/Model/Carrier/AbstractCarrierOnline.php

@@ -28,6 +28,14 @@ abstract class AbstractCarrierOnline extends AbstractCarrier
 
     const GUAM_REGION_CODE = 'GU';
 
+    const SPAIN_COUNTRY_ID = 'ES';
+
+    const CANARY_ISLANDS_COUNTRY_ID = 'IC';
+
+    const SANTA_CRUZ_DE_TENERIFE_REGION_ID = 'Santa Cruz de Tenerife';
+
+    const LAS_PALMAS_REGION_ID = 'Las Palmas';
+
     /**
      * Array of quotes
      *

app/code/Magento/Ups/Model/Carrier.php

@@ -334,6 +334,14 @@ public function setRequest(RateRequest $request)
             $destCountry = self::GUAM_COUNTRY_ID;
         }
 
+        // For UPS, Las Palmas and Santa Cruz de Tenerife will be represented by Canary Islands country
+        if (
+            $destCountry == self::SPAIN_COUNTRY_ID &&
+            ($request->getDestRegionCode() == self::LAS_PALMAS_REGION_ID || $request->getDestRegionCode() == self::SANTA_CRUZ_DE_TENERIFE_REGION_ID)
+        ) {
+            $destCountry = self::CANARY_ISLANDS_COUNTRY_ID;
+        }
+
         $country = $this->_countryFactory->create()->load($destCountry);
         $rowRequest->setDestCountry($country->getData('iso2_code') ?: $destCountry);