diff --git a/airflow-core/src/airflow/utils/helpers.py b/airflow-core/src/airflow/utils/helpers.py
index 74b7dacd33de7..ee6faa543a409 100644
--- a/airflow-core/src/airflow/utils/helpers.py
+++ b/airflow-core/src/airflow/utils/helpers.py
@@ -204,7 +204,7 @@ def build_airflow_dagrun_url(dag_id: str, run_id: str) -> str:
     http://localhost:8080/dags/hi/runs/manual__2025-02-23T18:27:39.051358+00:00_RZa1at4Q
     """
     baseurl = conf.get("api", "base_url", fallback="/")
-    return urljoin(baseurl, f"dags/{dag_id}/runs/{run_id}")
+    return urljoin(baseurl.rstrip("/") + "/", f"dags/{dag_id}/runs/{run_id}")
 
 
 # The 'template' argument is typed as Any because the jinja2.Template is too