diff --git a/ui/src/Stores/AlertStore.test.ts b/ui/src/Stores/AlertStore.test.ts
index f0da47705..bae98cd1f 100644
--- a/ui/src/Stores/AlertStore.test.ts
+++ b/ui/src/Stores/AlertStore.test.ts
@@ -94,6 +94,92 @@ describe("AlertStore.data", () => {
       store.data.getClusterAlertmanagersWithoutReadOnly("default"),
     ).toEqual([]);
   });
+
+  it("clustersWithoutReadOnly lists healthy members first", () => {
+    const store = new AlertStore([]);
+    store.data.setUpstreams({
+      counters: { total: 2, healthy: 1, failed: 1 },
+      clusters: { default: ["am1", "am2"] },
+      instances: [
+        {
+          name: "am1",
+          uri: "http://localhost",
+          publicURI: "http://example.com:8080",
+          readonly: false,
+          headers: { foo: "bar" },
+          corsCredentials: "include",
+          error: "bad",
+          version: "0.24.0",
+          cluster: "default",
+          clusterMembers: ["am1", "am2"],
+        },
+        {
+          name: "am2",
+          uri: "http://localhost:8081",
+          publicURI: "http://example.com",
+          readonly: false,
+          headers: {},
+          corsCredentials: "include",
+          error: "",
+          version: "0.24.0",
+          cluster: "default",
+          clusterMembers: ["am1", "am2"],
+        },
+      ],
+    });
+    expect(store.data.clustersWithoutReadOnly).toEqual({
+      default: ["am2", "am1"],
+    });
+  });
+
+  it("clustersWithoutReadOnly keeps healthy order", () => {
+    const store = new AlertStore([]);
+    store.data.setUpstreams({
+      counters: { total: 3, healthy: 3, failed: 0 },
+      clusters: { default: ["am1", "am2", "am3"] },
+      instances: [
+        {
+          name: "am1",
+          uri: "http://localhost",
+          publicURI: "http://example.com:8080",
+          readonly: false,
+          headers: { foo: "bar" },
+          corsCredentials: "include",
+          error: "",
+          version: "0.24.0",
+          cluster: "default",
+          clusterMembers: ["am1", "am2", "am3"],
+        },
+        {
+          name: "am2",
+          uri: "http://localhost:8081",
+          publicURI: "http://example.com",
+          readonly: false,
+          headers: {},
+          corsCredentials: "include",
+          error: "",
+          version: "0.24.0",
+          cluster: "default",
+          clusterMembers: ["am1", "am2", "am3"],
+        },
+        {
+          name: "am3",
+          uri: "http://localhost:8081",
+          publicURI: "http://example.com",
+          readonly: false,
+          headers: {},
+          corsCredentials: "include",
+          error: "",
+          version: "0.24.0",
+          cluster: "default",
+          clusterMembers: ["am1", "am2", "am3"],
+        },
+      ],
+    });
+    expect(store.data.clustersWithoutReadOnly).toEqual({
+      default: ["am1", "am2", "am3"],
+    });
+  });
 });
 
 describe("AlertStore.status", () => {
diff --git a/ui/src/Stores/AlertStore.ts b/ui/src/Stores/AlertStore.ts
index 158ebcb99..4da56b518 100644
--- a/ui/src/Stores/AlertStore.ts
+++ b/ui/src/Stores/AlertStore.ts
@@ -335,13 +335,19 @@ class AlertStore {
             );
         },
         get clustersWithoutReadOnly(): APIAlertsResponseUpstreamsClusterMapT {
+          const unhealthy = this.upstreams.instances
+            .filter((upstream) => upstream.error !== "")
+            .map((upstream) => upstream.name);
           const clusters: APIAlertsResponseUpstreamsClusterMapT = {};
           for (const clusterID of Object.keys(this.upstreams.clusters)) {
             const members = this.upstreams.clusters[clusterID].filter(
               (member) => this.isReadOnlyAlertmanager(member) === false,
             );
             if (members.length > 0) {
-              clusters[clusterID] = members;
+              clusters[clusterID] = [
+                ...members.filter((member) => !unhealthy.includes(member)),
+                ...members.filter((member) => unhealthy.includes(member)),
+              ];
             }
           }
           return clusters;