diff --git a/desktop/src/features/workflows/ui/WorkflowDeleteDialog.tsx b/desktop/src/features/workflows/ui/WorkflowDeleteDialog.tsx
index db07470f2c..925830990f 100644
--- a/desktop/src/features/workflows/ui/WorkflowDeleteDialog.tsx
+++ b/desktop/src/features/workflows/ui/WorkflowDeleteDialog.tsx
@@ -12,6 +12,7 @@ import {
 import { Button } from "@/shared/ui/button";
 
 type WorkflowDeleteDialogProps = {
+  isPending: boolean;
   open: boolean;
   workflow: Workflow | null;
   onConfirm: (workflow: Workflow) => void;
@@ -19,6 +20,7 @@ type WorkflowDeleteDialogProps = {
 };
 
 export function WorkflowDeleteDialog({
+  isPending,
   open,
   workflow,
   onConfirm,
@@ -37,13 +39,17 @@ export function WorkflowDeleteDialog({
         </AlertDialogHeader>
         <AlertDialogFooter>
           <AlertDialogCancel asChild>
-            <Button type="button" variant="outline">
+            <Button disabled={isPending} type="button" variant="outline">
               Cancel
             </Button>
           </AlertDialogCancel>
           <AlertDialogAction asChild>
             <Button
-              onClick={() => {
+              disabled={isPending}
+              onClick={(event) => {
+                // Keep this controlled dialog open until the relay confirms
+                // deletion. On failure the toast appears and the user can retry.
+                event.preventDefault();
                 if (workflow) {
                   onConfirm(workflow);
                 }
@@ -51,7 +57,7 @@ export function WorkflowDeleteDialog({
               type="button"
               variant="destructive"
             >
-              Delete
+              {isPending ? "Deleting…" : "Delete"}
             </Button>
           </AlertDialogAction>
         </AlertDialogFooter>
diff --git a/desktop/src/features/workflows/ui/WorkflowsView.tsx b/desktop/src/features/workflows/ui/WorkflowsView.tsx
index e0e5b7e948..d4906104fb 100644
--- a/desktop/src/features/workflows/ui/WorkflowsView.tsx
+++ b/desktop/src/features/workflows/ui/WorkflowsView.tsx
@@ -126,6 +126,14 @@ export function WorkflowsView({
 
   const triggerMutation = useMutation({
     mutationFn: (workflowId: string) => triggerWorkflow(workflowId),
+    onError: (error) => {
+      toast.error("Couldn’t run workflow", {
+        description:
+          error instanceof Error
+            ? error.message
+            : "The workflow did not start. Try again.",
+      });
+    },
     onSuccess: () => {
       void queryClient.invalidateQueries({
         predicate: (query) => query.queryKey[0] === "workflow-runs",
@@ -135,7 +143,16 @@ export function WorkflowsView({
 
   const deleteMutation = useMutation({
     mutationFn: (workflowId: string) => deleteWorkflow(workflowId),
+    onError: (error) => {
+      toast.error("Couldn’t delete workflow", {
+        description:
+          error instanceof Error
+            ? error.message
+            : "The workflow was not deleted. Try again.",
+      });
+    },
     onSuccess: (_data, workflowId) => {
+      setDeleteTarget(null);
       if (selectedWorkflowId === workflowId) {
         onCloseWorkflow();
       }
@@ -194,7 +211,6 @@ export function WorkflowsView({
   const handleConfirmDelete = React.useCallback(
     (workflow: Workflow) => {
       deleteOne(workflow.id);
-      setDeleteTarget(null);
     },
     [deleteOne],
   );
@@ -314,9 +330,10 @@ export function WorkflowsView({
       />
 
       <WorkflowDeleteDialog
+        isPending={deleteMutation.isPending}
         onConfirm={handleConfirmDelete}
         onOpenChange={(open) => {
-          if (!open) setDeleteTarget(null);
+          if (!open && !deleteMutation.isPending) setDeleteTarget(null);
         }}
         open={deleteTarget !== null}
         workflow={deleteTarget}