diff --git a/reana_workflow_controller/config.py b/reana_workflow_controller/config.py
index 6018fd49..c2405362 100644
--- a/reana_workflow_controller/config.py
+++ b/reana_workflow_controller/config.py
@@ -26,6 +26,22 @@ def _env_vars_dict_to_k8s_list(env_vars):
     return [{"name": name, "value": str(value)} for name, value in env_vars.items()]
 
 
+def compose_reana_url(hostname: str, hostport: int) -> str:
+    """
+    Compose a REANA API URL while omitting the default HTTPS port (443).
+
+    Args:
+        hostname (str): The REANA hostname.
+        hostport (int): The REANA host port.
+
+    Returns:
+        str: The full base URL.
+    """
+    if hostport == 443:
+        return f"https://{hostname}"
+    return f"https://{hostname}:{hostport}"
+
+
 SECRET_KEY = os.getenv("REANA_SECRET_KEY", "CHANGE_ME")
 """Secret key used for the application user sessions."""
 
@@ -277,8 +293,14 @@ def _parse_interactive_sessions_environments(env_var):
 REANA_GITLAB_URL = "https://{}".format(REANA_GITLAB_HOST)
 """GitLab API URL"""
 
-REANA_HOSTNAME = os.getenv("REANA_HOSTNAME", "CHANGE_ME")
-"""REANA URL"""
+REANA_HOSTNAME = os.getenv("REANA_HOSTNAME", "localhost")
+"""REANA host name."""
+
+REANA_HOSTPORT = os.getenv("REANA_HOSTPORT", "30443")
+"""REANA host name port number."""
+
+REANA_URL = compose_reana_url(REANA_HOSTNAME, REANA_HOSTPORT)
+"""REANA URL."""
 
 REANA_INGRESS_ANNOTATIONS = json.loads(os.getenv("REANA_INGRESS_ANNOTATIONS", "{}"))
 """REANA Ingress annotations defined by the administrator."""
diff --git a/reana_workflow_controller/consumer.py b/reana_workflow_controller/consumer.py
index ceeb5b5d..c871934e 100644
--- a/reana_workflow_controller/consumer.py
+++ b/reana_workflow_controller/consumer.py
@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 #
 # This file is part of REANA.
-# Copyright (C) 2018, 2019, 2020, 2021, 2022, 2023, 2024 CERN.
+# Copyright (C) 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025 CERN.
 #
 # REANA is free software; you can redistribute it and/or modify it
 # under the terms of the MIT License; see LICENSE file for more details.
@@ -40,7 +40,7 @@
     ALIVE_STATUSES,
     PROGRESS_STATUSES,
     REANA_GITLAB_URL,
-    REANA_HOSTNAME,
+    REANA_URL,
     REANA_JOB_STATUS_CONSUMER_PREFETCH_COUNT,
 )
 from reana_workflow_controller.errors import REANAWorkflowControllerError
@@ -196,7 +196,7 @@ def _update_commit_status(workflow, status):
         return
     gitlab_access_token = gitlab_access_token_secret.value_str
 
-    target_url = f"https://{REANA_HOSTNAME}/api/workflows/{workflow.id_}/logs"
+    target_url = f"{REANA_URL}/api/workflows/{workflow.id_}/logs"
     workflow_name = urlparse.quote_plus(workflow.git_repo)
     system_name = "reana"
     commit_status_url = (
diff --git a/reana_workflow_controller/rest/utils.py b/reana_workflow_controller/rest/utils.py
index d457a4d4..b7377489 100644
--- a/reana_workflow_controller/rest/utils.py
+++ b/reana_workflow_controller/rest/utils.py
@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 #
 # This file is part of REANA.
-# Copyright (C) 2020, 2021, 2022, 2023, 2024 CERN.
+# Copyright (C) 2020, 2021, 2022, 2023, 2024, 2025 CERN.
 #
 # REANA is free software; you can redistribute it and/or modify it
 # under the terms of the MIT License; see LICENSE file for more details.
diff --git a/reana_workflow_controller/rest/workflows.py b/reana_workflow_controller/rest/workflows.py
index 575a308c..f0739dd0 100644
--- a/reana_workflow_controller/rest/workflows.py
+++ b/reana_workflow_controller/rest/workflows.py
@@ -41,7 +41,7 @@
     get_default_quota_resource,
 )
 from reana_workflow_controller.config import (
-    REANA_HOSTNAME,
+    REANA_URL,
     DEFAULT_NAME_FOR_WORKFLOWS,
     MAX_WORKFLOW_SHARING_MESSAGE_LENGTH,
 )
@@ -631,7 +631,7 @@ def create_workflow():  # noqa
         if requires_dask(workflow):
             dask_service = Service(
                 name=get_dask_component_name(workflow.id_, "database_model_service"),
-                uri=f"https://{REANA_HOSTNAME}/{workflow_uuid}/dashboard/status",
+                uri=f"{REANA_URL}/{workflow_uuid}/dashboard/status",
                 type_=ServiceType.dask,
                 status=ServiceStatus.created,
             )
diff --git a/tests/test_utils.py b/tests/test_utils.py
index 95c78da4..c281c93a 100644
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 #
 # This file is part of REANA.
-# Copyright (C) 2018, 2019, 2020, 2021, 2022, 2023 CERN.
+# Copyright (C) 2018, 2019, 2020, 2021, 2022, 2023, 2025 CERN.
 #
 # REANA is free software; you can redistribute it and/or modify it
 # under the terms of the MIT License; see LICENSE file for more details.
@@ -31,6 +31,7 @@
     update_users_disk_quota,
 )
 from reana_workflow_controller.errors import REANAWorkflowControllerError
+from reana_workflow_controller.config import compose_reana_url
 from reana_workflow_controller.rest.utils import (
     create_workflow_workspace,
     delete_workflow,
@@ -343,3 +344,21 @@ def test_mv_files(
         assert target_path.exists()
         if source_content:
             assert target_path.read_text() == source_content
+
+
+# Note that this function is inside config.py file and not in
+# `rest/utils.py file due to circular import issues.` However,
+# it is a utility function so it does not hurt to test it in
+# this file.
+@pytest.mark.parametrize(
+    "hostname, hostport, expected_url",
+    [
+        ("reana.cern.ch", 443, "https://reana.cern.ch"),
+        ("reana.cern.ch", 30443, "https://reana.cern.ch:30443"),
+        ("example.com", 443, "https://example.com"),
+        ("example.com", 8080, "https://example.com:8080"),
+    ],
+)
+def test_compose_reana_url(hostname, hostport, expected_url):
+    """Test composing base reana url."""
+    assert compose_reana_url(hostname, hostport) == expected_url