diff --git a/homeassistant/components/sonarr/config_flow.py b/homeassistant/components/sonarr/config_flow.py
index c868c04f7d0..e1cedba10e7 100644
--- a/homeassistant/components/sonarr/config_flow.py
+++ b/homeassistant/components/sonarr/config_flow.py
@@ -93,6 +93,13 @@ class SonarrConfigFlow(ConfigFlow, domain=DOMAIN):
         errors = {}
 
         if user_input is not None:
+            # aiopyarr defaults to the service port if one isn't given
+            # this is counter to standard practice where http = 80
+            # and https = 443.
+            if CONF_URL in user_input:
+                url = yarl.URL(user_input[CONF_URL])
+                user_input[CONF_URL] = f"{url.scheme}://{url.host}:{url.port}{url.path}"
+
             if self.source == SOURCE_REAUTH:
                 user_input = {**self._get_reauth_entry().data, **user_input}
 
diff --git a/tests/components/sonarr/__init__.py b/tests/components/sonarr/__init__.py
index b6050808a34..660102ed082 100644
--- a/tests/components/sonarr/__init__.py
+++ b/tests/components/sonarr/__init__.py
@@ -5,6 +5,6 @@ from homeassistant.const import CONF_API_KEY, CONF_URL
 MOCK_REAUTH_INPUT = {CONF_API_KEY: "test-api-key-reauth"}
 
 MOCK_USER_INPUT = {
-    CONF_URL: "http://192.168.1.189:8989",
+    CONF_URL: "http://192.168.1.189:8989/",
     CONF_API_KEY: "MOCK_API_KEY",
 }
diff --git a/tests/components/sonarr/test_config_flow.py b/tests/components/sonarr/test_config_flow.py
index 118d5020cba..efbfbd749b3 100644
--- a/tests/components/sonarr/test_config_flow.py
+++ b/tests/components/sonarr/test_config_flow.py
@@ -50,6 +50,34 @@ async def test_cannot_connect(
     assert result["errors"] == {"base": "cannot_connect"}
 
 
+async def test_url_rewrite(
+    hass: HomeAssistant,
+    mock_sonarr_config_flow: MagicMock,
+    mock_setup_entry: None,
+) -> None:
+    """Test the full manual user flow from start to finish."""
+    result = await hass.config_entries.flow.async_init(
+        DOMAIN,
+        context={CONF_SOURCE: SOURCE_USER},
+    )
+
+    assert result["type"] is FlowResultType.FORM
+    assert result["step_id"] == "user"
+
+    user_input = MOCK_USER_INPUT.copy()
+    user_input[CONF_URL] = "https://192.168.1.189"
+    result = await hass.config_entries.flow.async_configure(
+        result["flow_id"],
+        user_input=user_input,
+    )
+
+    assert result["type"] is FlowResultType.CREATE_ENTRY
+    assert result["title"] == "192.168.1.189"
+
+    assert result["data"]
+    assert result["data"][CONF_URL] == "https://192.168.1.189:443/"
+
+
 async def test_invalid_auth(
     hass: HomeAssistant, mock_sonarr_config_flow: MagicMock
 ) -> None:
@@ -145,7 +173,7 @@ async def test_full_user_flow_implementation(
     assert result["title"] == "192.168.1.189"
 
     assert result["data"]
-    assert result["data"][CONF_URL] == "http://192.168.1.189:8989"
+    assert result["data"][CONF_URL] == "http://192.168.1.189:8989/"
 
 
 async def test_full_user_flow_advanced_options(
@@ -175,7 +203,7 @@ async def test_full_user_flow_advanced_options(
     assert result["title"] == "192.168.1.189"
 
     assert result["data"]
-    assert result["data"][CONF_URL] == "http://192.168.1.189:8989"
+    assert result["data"][CONF_URL] == "http://192.168.1.189:8989/"
     assert result["data"][CONF_VERIFY_SSL]