diff --git a/airflow-core/src/airflow/ui/src/pages/DagRuns/BulkDeleteDagRunsButton.tsx b/airflow-core/src/airflow/ui/src/pages/DagRuns/BulkDeleteDagRunsButton.tsx
index e1a4b9c5c35ff..66cbb06f4dd45 100644
--- a/airflow-core/src/airflow/ui/src/pages/DagRuns/BulkDeleteDagRunsButton.tsx
+++ b/airflow-core/src/airflow/ui/src/pages/DagRuns/BulkDeleteDagRunsButton.tsx
@@ -16,7 +16,7 @@
  * specific language governing permissions and limitations
  * under the License.
  */
-import { Box, Button, Flex, Heading, Text, useDisclosure, VStack } from "@chakra-ui/react";
+import { Box, Button, Flex, Heading, Stack, Text, useDisclosure, VStack } from "@chakra-ui/react";
 import type { ColumnDef } from "@tanstack/react-table";
 import type { TFunction } from "i18next";
 import { useTranslation } from "react-i18next";
@@ -27,7 +27,7 @@ import { DataTable } from "src/components/DataTable";
 import { ErrorAlert } from "src/components/ErrorAlert";
 import { StateBadge } from "src/components/StateBadge";
 import Time from "src/components/Time";
-import { Accordion, Dialog } from "src/components/ui";
+import { Accordion, Alert, Dialog } from "src/components/ui";
 import { useBulkDeleteDagRuns } from "src/queries/useBulkDeleteDagRuns";
 
 type Props = {
@@ -61,11 +61,13 @@ const getColumns = (translate: TFunction): Array<ColumnDef<DAGRunResponse>> => [
 const BulkDeleteDagRunsButton = ({ clearSelections, selectedDagRuns }: Props) => {
   const { t: translate } = useTranslation(["common", "dags"]);
   const { onClose, onOpen, open } = useDisclosure();
-  const { bulkAction, error, isPending } = useBulkDeleteDagRuns({
+  const { bulkAction, data, error, isPending } = useBulkDeleteDagRuns({
     clearSelections,
     onSuccessConfirm: onClose,
   });
 
+  const actionErrors = (data?.delete?.errors ?? []) as Array<{ error: string; status_code?: number }>;
+
   const columns = getColumns(translate);
 
   const byDagId = new Map<string, Array<DAGRunResponse>>();
@@ -143,6 +145,14 @@ const BulkDeleteDagRunsButton = ({ clearSelections, selectedDagRuns }: Props) =>
             </Box>
 
             <ErrorAlert error={error} />
+            {actionErrors.length > 0 ? (
+              <Stack gap={2} mt={3}>
+                {actionErrors.map((actionError, index) => (
+                  // eslint-disable-next-line react/no-array-index-key -- per-entity errors have no stable id
+                  <Alert key={index} status="error" title={actionError.error} />
+                ))}
+              </Stack>
+            ) : undefined}
             <Flex justifyContent="end" mt={3}>
               <Button
                 colorPalette="danger"
diff --git a/airflow-core/src/airflow/ui/src/pages/TaskInstances/BulkDeleteTaskInstancesButton.tsx b/airflow-core/src/airflow/ui/src/pages/TaskInstances/BulkDeleteTaskInstancesButton.tsx
index 8e752907de9d5..41ca23c4fd14c 100644
--- a/airflow-core/src/airflow/ui/src/pages/TaskInstances/BulkDeleteTaskInstancesButton.tsx
+++ b/airflow-core/src/airflow/ui/src/pages/TaskInstances/BulkDeleteTaskInstancesButton.tsx
@@ -16,7 +16,7 @@
  * specific language governing permissions and limitations
  * under the License.
  */
-import { Box, Button, Flex, Heading, Text, useDisclosure, VStack } from "@chakra-ui/react";
+import { Box, Button, Flex, Heading, Stack, Text, useDisclosure, VStack } from "@chakra-ui/react";
 import { useTranslation } from "react-i18next";
 import { FiTrash2 } from "react-icons/fi";
 
@@ -24,7 +24,7 @@ import type { TaskInstanceResponse } from "openapi/requests/types.gen";
 import { getColumns } from "src/components/ActionAccordion/columns";
 import { DataTable } from "src/components/DataTable";
 import { ErrorAlert } from "src/components/ErrorAlert";
-import { Accordion, Dialog } from "src/components/ui";
+import { Accordion, Alert, Dialog } from "src/components/ui";
 import { useBulkTaskInstances } from "src/queries/useBulkTaskInstances";
 
 type Props = {
@@ -35,11 +35,13 @@ type Props = {
 const BulkDeleteTaskInstancesButton = ({ clearSelections, selectedTaskInstances }: Props) => {
   const { t: translate } = useTranslation();
   const { onClose, onOpen, open } = useDisclosure();
-  const { bulkAction, error, isPending } = useBulkTaskInstances({
+  const { bulkAction, data, error, isPending } = useBulkTaskInstances({
     clearSelections,
     onSuccessConfirm: onClose,
   });
 
+  const actionErrors = (data?.delete?.errors ?? []) as Array<{ error: string; status_code?: number }>;
+
   const columns = getColumns(translate);
 
   // Group by dag_run_id for display
@@ -118,6 +120,14 @@ const BulkDeleteTaskInstancesButton = ({ clearSelections, selectedTaskInstances
             </Box>
 
             <ErrorAlert error={error} />
+            {actionErrors.length > 0 ? (
+              <Stack gap={2} mt={3}>
+                {actionErrors.map((actionError, index) => (
+                  // eslint-disable-next-line react/no-array-index-key -- per-entity errors have no stable id
+                  <Alert key={index} status="error" title={actionError.error} />
+                ))}
+              </Stack>
+            ) : undefined}
             <Flex justifyContent="end" mt={3}>
               <Button
                 colorPalette="danger"
diff --git a/airflow-core/src/airflow/ui/src/pages/TaskInstances/BulkMarkTaskInstancesAsButton.tsx b/airflow-core/src/airflow/ui/src/pages/TaskInstances/BulkMarkTaskInstancesAsButton.tsx
index 41eb7c9e730db..b9a38a6a0600e 100644
--- a/airflow-core/src/airflow/ui/src/pages/TaskInstances/BulkMarkTaskInstancesAsButton.tsx
+++ b/airflow-core/src/airflow/ui/src/pages/TaskInstances/BulkMarkTaskInstancesAsButton.tsx
@@ -16,7 +16,7 @@
  * specific language governing permissions and limitations
  * under the License.
  */
-import { Badge, Box, Button, Flex, Heading, HStack, VStack, useDisclosure } from "@chakra-ui/react";
+import { Badge, Box, Button, Flex, Heading, HStack, Stack, VStack, useDisclosure } from "@chakra-ui/react";
 import { useState } from "react";
 import { useTranslation } from "react-i18next";
 import { FiX } from "react-icons/fi";
@@ -27,7 +27,7 @@ import { ActionAccordion } from "src/components/ActionAccordion";
 import { ErrorAlert } from "src/components/ErrorAlert";
 import { allowedStates } from "src/components/MarkAs/utils";
 import { StateBadge } from "src/components/StateBadge";
-import { Dialog, Menu } from "src/components/ui";
+import { Alert, Dialog, Menu } from "src/components/ui";
 import SegmentedControl from "src/components/ui/SegmentedControl";
 import { useBulkMarkAsDryRun } from "src/queries/useBulkMarkAsDryRun";
 import { useBulkTaskInstances } from "src/queries/useBulkTaskInstances";
@@ -43,11 +43,13 @@ const BulkMarkTaskInstancesAsButton = ({ clearSelections, selectedTaskInstances
   const [state, setState] = useState<TaskInstanceState>("success");
   const [selectedOptions, setSelectedOptions] = useState<Array<string>>([]);
   const [note, setNote] = useState<string | null>(null);
-  const { bulkAction, error, isPending, setError } = useBulkTaskInstances({
+  const { bulkAction, data, error, isPending, reset } = useBulkTaskInstances({
     clearSelections,
     onSuccessConfirm: onClose,
   });
 
+  const actionErrors = (data?.update?.errors ?? []) as Array<{ error: string; status_code?: number }>;
+
   const past = selectedOptions.includes("past");
   const future = selectedOptions.includes("future");
   const upstream = selectedOptions.includes("upstream");
@@ -73,7 +75,7 @@ const BulkMarkTaskInstancesAsButton = ({ clearSelections, selectedTaskInstances
     setState(newState);
     setSelectedOptions([]);
     setNote(null);
-    setError(undefined);
+    reset();
     onOpen();
   };
 
@@ -164,6 +166,14 @@ const BulkMarkTaskInstancesAsButton = ({ clearSelections, selectedTaskInstances
             </Flex>
             <ActionAccordion affectedTasks={affectedTasks} groupByRunId note={note} setNote={setNote} />
             <ErrorAlert error={error} />
+            {actionErrors.length > 0 ? (
+              <Stack gap={2} mt={3}>
+                {actionErrors.map((actionError, index) => (
+                  // eslint-disable-next-line react/no-array-index-key -- per-entity errors have no stable id
+                  <Alert key={index} status="error" title={actionError.error} />
+                ))}
+              </Stack>
+            ) : undefined}
             <Flex justifyContent="end" mt={3}>
               <Button
                 disabled={affectedTasks.total_entries === 0}
diff --git a/airflow-core/src/airflow/ui/src/queries/useBulkDeleteDagRuns.ts b/airflow-core/src/airflow/ui/src/queries/useBulkDeleteDagRuns.ts
index d0a3fcff9786d..365465fa66330 100644
--- a/airflow-core/src/airflow/ui/src/queries/useBulkDeleteDagRuns.ts
+++ b/airflow-core/src/airflow/ui/src/queries/useBulkDeleteDagRuns.ts
@@ -17,7 +17,7 @@
  * under the License.
  */
 import { useQueryClient } from "@tanstack/react-query";
-import { useRef, useState } from "react";
+import { useRef } from "react";
 import { useTranslation } from "react-i18next";
 
 import {
@@ -25,7 +25,7 @@ import {
   useDagRunServiceGetDagRunsKey,
   useTaskInstanceServiceGetTaskInstancesKey,
 } from "openapi/queries";
-import type { BulkActionResponse, BulkBody_BulkDAGRunBody_, BulkResponse } from "openapi/requests/types.gen";
+import type { BulkBody_BulkDAGRunBody_, BulkResponse } from "openapi/requests/types.gen";
 import { toaster } from "src/components/ui";
 
 import { gridQueryKeys, tiPerAttemptQueryKeys } from "./gridViewQueryKeys";
@@ -35,25 +35,8 @@ type Props = {
   readonly onSuccessConfirm: VoidFunction;
 };
 
-const handleActionResult = (
-  actionResult: BulkActionResponse,
-  setError: (error: unknown) => void,
-  onSuccess: (count: number, keys: Array<string>) => void,
-) => {
-  const { errors, success } = actionResult;
-
-  if (Array.isArray(errors) && errors.length > 0) {
-    const apiError = errors[0] as { error: string };
-
-    setError({ body: { detail: apiError.error } });
-  } else if (Array.isArray(success) && success.length > 0) {
-    onSuccess(success.length, success);
-  }
-};
-
 export const useBulkDeleteDagRuns = ({ clearSelections, onSuccessConfirm }: Props) => {
   const queryClient = useQueryClient();
-  const [error, setError] = useState<unknown>(undefined);
   const affectedDagIds = useRef<Set<string>>(new Set());
   const { t: translate } = useTranslation(["common", "dags"]);
 
@@ -67,36 +50,41 @@ export const useBulkDeleteDagRuns = ({ clearSelections, onSuccessConfirm }: Prop
       ),
     ]);
 
-    if (responseData.delete) {
-      handleActionResult(responseData.delete, setError, (count, keys) => {
-        toaster.create({
-          description: translate("toaster.bulkDelete.success.description", {
-            count,
-            keys: keys.join(", "),
-            resourceName: translate("dagRun_other"),
-          }),
-          title: translate("toaster.bulkDelete.success.title", {
-            resourceName: translate("dagRun_other"),
-          }),
-          type: "success",
-        });
-        clearSelections();
-        onSuccessConfirm();
+    const deleteResult = responseData.delete;
+
+    if (!deleteResult) {
+      return;
+    }
+
+    const successKeys = deleteResult.success ?? [];
+    const actionErrors = deleteResult.errors ?? [];
+
+    if (successKeys.length > 0) {
+      toaster.create({
+        description: translate("toaster.bulkDelete.success.description", {
+          count: successKeys.length,
+          keys: successKeys.join(", "),
+          resourceName: translate("dagRun_other"),
+        }),
+        title: translate("toaster.bulkDelete.success.title", {
+          resourceName: translate("dagRun_other"),
+        }),
+        type: "success",
       });
+      clearSelections();
     }
-  };
 
-  const onError = (_error: unknown) => {
-    setError(_error);
+    // Per-entity failures (status 200 with items in ``errors``) keep the dialog open
+    // so the user can see what failed; the consumer renders ``data.delete.errors``.
+    if (actionErrors.length === 0) {
+      onSuccessConfirm();
+    }
   };
 
-  const { isPending, mutate } = useDagRunServiceBulkDagRuns({
-    onError,
-    onSuccess,
-  });
+  const { data, error, isPending, mutate, reset } = useDagRunServiceBulkDagRuns({ onSuccess });
 
   const bulkAction = (requestBody: BulkBody_BulkDAGRunBody_) => {
-    setError(undefined);
+    reset();
     const dagIds = new Set<string>();
 
     for (const action of requestBody.actions) {
@@ -110,5 +98,5 @@ export const useBulkDeleteDagRuns = ({ clearSelections, onSuccessConfirm }: Prop
     mutate({ dagId: "~", requestBody });
   };
 
-  return { bulkAction, error, isPending, setError };
+  return { bulkAction, data, error, isPending, reset };
 };
diff --git a/airflow-core/src/airflow/ui/src/queries/useBulkTaskInstances.ts b/airflow-core/src/airflow/ui/src/queries/useBulkTaskInstances.ts
index ac47c550b3724..7fc3538b60fe5 100644
--- a/airflow-core/src/airflow/ui/src/queries/useBulkTaskInstances.ts
+++ b/airflow-core/src/airflow/ui/src/queries/useBulkTaskInstances.ts
@@ -17,7 +17,6 @@
  * under the License.
  */
 import { useQueryClient } from "@tanstack/react-query";
-import { useState } from "react";
 import { useTranslation } from "react-i18next";
 
 import {
@@ -25,11 +24,7 @@ import {
   useTaskInstanceServiceBulkTaskInstances,
   useTaskInstanceServiceGetTaskInstancesKey,
 } from "openapi/queries";
-import type {
-  BulkActionResponse,
-  BulkBody_BulkTaskInstanceBody_,
-  BulkResponse,
-} from "openapi/requests/types.gen";
+import type { BulkBody_BulkTaskInstanceBody_, BulkResponse } from "openapi/requests/types.gen";
 import { toaster } from "src/components/ui";
 
 import { tiPerAttemptQueryKeys } from "./gridViewQueryKeys";
@@ -39,25 +34,8 @@ type Props = {
   readonly onSuccessConfirm: VoidFunction;
 };
 
-const handleActionResult = (
-  actionResult: BulkActionResponse,
-  setError: (error: unknown) => void,
-  onSuccess: (count: number, keys: Array<string>) => void,
-) => {
-  const { errors, success } = actionResult;
-
-  if (Array.isArray(errors) && errors.length > 0) {
-    const apiError = errors[0] as { error: string };
-
-    setError({ body: { detail: apiError.error } });
-  } else if (Array.isArray(success) && success.length > 0) {
-    onSuccess(success.length, success);
-  }
-};
-
 export const useBulkTaskInstances = ({ clearSelections, onSuccessConfirm }: Props) => {
   const queryClient = useQueryClient();
-  const [error, setError] = useState<unknown>(undefined);
   const { t: translate } = useTranslation(["common", "dags"]);
 
   const onSuccess = async (responseData: BulkResponse) => {
@@ -71,38 +49,41 @@ export const useBulkTaskInstances = ({ clearSelections, onSuccessConfirm }: Prop
     const actionResult = responseData.delete ?? responseData.update;
     const toasterKey = isDelete ? "toaster.bulkDelete" : "toaster.bulkUpdate";
 
-    if (actionResult) {
-      handleActionResult(actionResult, setError, (count, keys) => {
-        toaster.create({
-          description: translate(`${toasterKey}.success.description`, {
-            count,
-            keys: keys.join(", "),
-            resourceName: translate("taskInstance_other"),
-          }),
-          title: translate(`${toasterKey}.success.title`, {
-            resourceName: translate("taskInstance_other"),
-          }),
-          type: "success",
-        });
-        clearSelections();
-        onSuccessConfirm();
+    if (!actionResult) {
+      return;
+    }
+
+    const successKeys = actionResult.success ?? [];
+    const actionErrors = actionResult.errors ?? [];
+
+    if (successKeys.length > 0) {
+      toaster.create({
+        description: translate(`${toasterKey}.success.description`, {
+          count: successKeys.length,
+          keys: successKeys.join(", "),
+          resourceName: translate("taskInstance_other"),
+        }),
+        title: translate(`${toasterKey}.success.title`, {
+          resourceName: translate("taskInstance_other"),
+        }),
+        type: "success",
       });
+      clearSelections();
     }
-  };
 
-  const onError = (_error: unknown) => {
-    setError(_error);
+    // Per-entity failures (status 200 with items in ``errors``) keep the dialog open
+    // so the user can see what failed; the consumer renders ``data.<action>.errors``.
+    if (actionErrors.length === 0) {
+      onSuccessConfirm();
+    }
   };
 
-  const { isPending, mutate } = useTaskInstanceServiceBulkTaskInstances({
-    onError,
-    onSuccess,
-  });
+  const { data, error, isPending, mutate, reset } = useTaskInstanceServiceBulkTaskInstances({ onSuccess });
 
   const bulkAction = (requestBody: BulkBody_BulkTaskInstanceBody_) => {
-    setError(undefined);
+    reset();
     mutate({ dagId: "~", dagRunId: "~", requestBody });
   };
 
-  return { bulkAction, error, isPending, setError };
+  return { bulkAction, data, error, isPending, reset };
 };