diff --git a/src/routes/[lang]/schedule/_guards.test.ts b/src/routes/[lang]/schedule/_guards.test.ts
new file mode 100644
index 00000000..f3265de0
--- /dev/null
+++ b/src/routes/[lang]/schedule/_guards.test.ts
@@ -0,0 +1,49 @@
+/**
+ * Unit tests for scheduleDateRedirect guard utility.
+ *
+ * Clock frozen at 2026-05-15 (noon local). Schedule window: 2026-05-14 … 2027-04-10.
+ */
+
+import { describe, it, expect, vi, beforeEach, afterEach } from "vitest";
+import { scheduleDateRedirect } from "./_guards.js";
+
+describe("scheduleDateRedirect (clock frozen 2026-05-15)", () => {
+ beforeEach(() => {
+ vi.useFakeTimers();
+ vi.setSystemTime(new Date(2026, 4, 15, 12)); // May 15 2026 noon
+ });
+ afterEach(() => {
+ vi.useRealTimers();
+ });
+
+ it("returns null for a date inside the window (today)", () => {
+ expect(scheduleDateRedirect("ru-ru", "20260515")).toBeNull();
+ });
+
+ it("returns null for the earliest allowed date (today - 1)", () => {
+ expect(scheduleDateRedirect("ru-ru", "20260514")).toBeNull();
+ });
+
+ it("returns null for the latest allowed date (today + 330)", () => {
+ // 2026-05-15 + 330 days = 2027-04-10
+ expect(scheduleDateRedirect("ru-ru", "20270410")).toBeNull();
+ });
+
+ it("redirects when date is too early (today - 2)", () => {
+ expect(scheduleDateRedirect("ru-ru", "20260513")).toBe("/ru-ru/schedule");
+ });
+
+ it("redirects when date is too late (today + 331)", () => {
+ // 2026-05-15 + 331 days = 2027-04-11
+ expect(scheduleDateRedirect("ru-ru", "20270411")).toBe("/ru-ru/schedule");
+ });
+
+ it("uses the supplied locale in the redirect path", () => {
+ expect(scheduleDateRedirect("en-us", "20260101")).toBe("/en-us/schedule");
+ });
+
+ it("returns null for a mid-window date (today + 100)", () => {
+ // 2026-05-15 + 100 = 2026-08-23
+ expect(scheduleDateRedirect("ru-ru", "20260823")).toBeNull();
+ });
+});
diff --git a/src/routes/[lang]/schedule/_guards.ts b/src/routes/[lang]/schedule/_guards.ts
new file mode 100644
index 00000000..25d5979f
--- /dev/null
+++ b/src/routes/[lang]/schedule/_guards.ts
@@ -0,0 +1,19 @@
+/**
+ * Shared date-window guard for Schedule routes per TZ §4.1.2 ¶3-4 / 4.1.2-R11.
+ *
+ * Out-of-window dates redirect to the Schedule start page instead of 404.
+ * Parse failures (malformed URLs) continue to produce 404 via existing logic.
+ */
+
+import { isInScheduleWindow } from "@/shared/dateWindow.js";
+
+/**
+ * Returns the redirect target path when the given yyyymmdd date falls outside
+ * the Schedule [-1, +330] day window. Returns null to allow normal render.
+ *
+ * Only called after a successful URL parse — malformed dates never reach here.
+ */
+export function scheduleDateRedirect(locale: string, yyyymmdd: string): string | null {
+ if (!isInScheduleWindow(yyyymmdd)) return `/${locale}/schedule`;
+ return null;
+}
diff --git a/src/routes/[lang]/schedule/route/[params]/[returnParams]/page.test.tsx b/src/routes/[lang]/schedule/route/[params]/[returnParams]/page.test.tsx
new file mode 100644
index 00000000..d5d73651
--- /dev/null
+++ b/src/routes/[lang]/schedule/route/[params]/[returnParams]/page.test.tsx
@@ -0,0 +1,137 @@
+/**
+ * Tests for the round-trip schedule route search page.
+ *
+ * Verifies that out-of-window dates (outbound OR inbound) redirect to
+ * /{locale}/schedule (TZ §4.1.2-R11), in-window dates render normally,
+ * and malformed URLs still produce 404.
+ *
+ * @vitest-environment jsdom
+ */
+
+import { describe, it, expect, vi, beforeEach, afterEach } from "vitest";
+import { render, screen } from "@testing-library/react";
+import React from "react";
+
+// Freeze clock: today = 2026-05-15. Schedule window: 2026-05-14 … 2027-04-10.
+beforeEach(() => {
+ vi.useFakeTimers();
+ vi.setSystemTime(new Date(2026, 4, 15, 12));
+});
+afterEach(() => {
+ vi.useRealTimers();
+});
+
+// --- mocks ---
+
+vi.mock("@/i18n/provider.js", () => ({
+ useTranslation: () => ({ t: (k: string) => k, i18n: { language: "ru" } }),
+}));
+
+vi.mock("@/env/index.js", () => ({
+ getEnv: () => ({ PROD_ORIGIN: "https://aeroflot.ru" }),
+}));
+
+vi.mock("@/ui/seo/SeoHead.js", () => ({
+ SeoHead: () => ,
+}));
+
+vi.mock("@/ui/errors/ErrorPage.js", () => ({
+ ErrorPage: ({ code }: { code: string }) => ,
+}));
+
+vi.mock("@/ui/flights/FlightListSkeleton.js", () => ({
+ FlightListSkeleton: () => ,
+}));
+
+vi.mock(
+ "@/features/schedule/components/ScheduleSearchPage.js",
+ () => ({ ScheduleSearchPage: () => }),
+);
+
+vi.mock("@/features/schedule/seo.js", () => ({
+ buildScheduleSearchSeo: () => ({}),
+}));
+
+const mockNavigate = vi.fn();
+vi.mock("@modern-js/runtime/router", () => ({
+ useParams: vi.fn(),
+ Navigate: ({ to }: { to: string }) => {
+ mockNavigate(to);
+ return ;
+ },
+}));
+
+import { useParams } from "@modern-js/runtime/router";
+import ScheduleRoundTripSearchPage from "./page.js";
+
+function renderWithParams(params: string, returnParams: string, lang = "ru-ru") {
+ vi.mocked(useParams).mockReturnValue({ params, returnParams, lang });
+ return render();
+}
+
+// In-window segment: SVO-LED-20260515-20260515 (today, well within window)
+// Out-of-window (future): SVO-LED-20270411-20270411 (today + 331)
+// Out-of-window (past): SVO-LED-20260513-20260513 (today - 2)
+
+describe("ScheduleRoundTripSearchPage — date-window guard", () => {
+ beforeEach(() => {
+ mockNavigate.mockReset();
+ });
+
+ it("renders normally when both dates are in-window", () => {
+ renderWithParams(
+ "SVO-LED-20260515-20260515",
+ "LED-SVO-20260520-20260520",
+ );
+ expect(screen.getByTestId("seo-head")).toBeTruthy();
+ expect(screen.queryByTestId("navigate")).toBeNull();
+ });
+
+ it("redirects when outbound date is too late (> +330)", () => {
+ renderWithParams(
+ "SVO-LED-20270411-20270411",
+ "LED-SVO-20270415-20270415",
+ );
+ expect(screen.getByTestId("navigate")).toBeTruthy();
+ expect(mockNavigate).toHaveBeenCalledWith("/ru-ru/schedule");
+ });
+
+ it("redirects when outbound date is too early (< -1)", () => {
+ renderWithParams(
+ "SVO-LED-20260513-20260513",
+ "LED-SVO-20260520-20260520",
+ );
+ expect(screen.getByTestId("navigate")).toBeTruthy();
+ expect(mockNavigate).toHaveBeenCalledWith("/ru-ru/schedule");
+ });
+
+ it("redirects when inbound date is out-of-window while outbound is in-window", () => {
+ renderWithParams(
+ "SVO-LED-20260515-20260515",
+ "LED-SVO-20270411-20270411",
+ );
+ expect(screen.getByTestId("navigate")).toBeTruthy();
+ expect(mockNavigate).toHaveBeenCalledWith("/ru-ru/schedule");
+ });
+
+ it("uses the route locale in the redirect path", () => {
+ renderWithParams(
+ "SVO-LED-20270411-20270411",
+ "LED-SVO-20270415-20270415",
+ "en-us",
+ );
+ expect(mockNavigate).toHaveBeenCalledWith("/en-us/schedule");
+ });
+
+ it("shows 404 for a malformed outbound URL", () => {
+ renderWithParams("SVO-LED", "LED-SVO-20260520-20260520");
+ expect(screen.getByTestId("error-404")).toBeTruthy();
+ expect(screen.queryByTestId("navigate")).toBeNull();
+ });
+
+ it("shows 404 for a malformed inbound URL", () => {
+ renderWithParams("SVO-LED-20260515-20260515", "LED-SVO");
+ expect(screen.getByTestId("error-404")).toBeTruthy();
+ expect(screen.queryByTestId("navigate")).toBeNull();
+ });
+});
diff --git a/src/routes/[lang]/schedule/route/[params]/[returnParams]/page.tsx b/src/routes/[lang]/schedule/route/[params]/[returnParams]/page.tsx
index 928fad3c..c33a3f10 100644
--- a/src/routes/[lang]/schedule/route/[params]/[returnParams]/page.tsx
+++ b/src/routes/[lang]/schedule/route/[params]/[returnParams]/page.tsx
@@ -6,7 +6,7 @@
*/
import { lazy, Suspense } from "react";
-import { useParams } from "@modern-js/runtime/router";
+import { useParams, Navigate } from "@modern-js/runtime/router";
import { useTranslation } from "@/i18n/provider.js";
import { parseScheduleRouteParams } from "@/features/schedule/url.js";
import { buildScheduleSearchSeo } from "@/features/schedule/seo.js";
@@ -14,6 +14,7 @@ import { SeoHead } from "@/ui/seo/SeoHead.js";
import { FlightListSkeleton } from "@/ui/flights/FlightListSkeleton.js";
import { ErrorPage } from "@/ui/errors/ErrorPage.js";
import { getEnv } from "@/env/index.js";
+import { scheduleDateRedirect } from "../../../_guards.js";
const ScheduleSearchPage = lazy(() =>
import("@/features/schedule/components/ScheduleSearchPage.js").then(
@@ -33,6 +34,11 @@ export default function ScheduleRoundTripSearchPage(): JSX.Element {
if (!outbound || !inbound) return ;
+ const redirect =
+ scheduleDateRedirect(locale, outbound.dateFrom) ??
+ scheduleDateRedirect(locale, inbound.dateFrom);
+ if (redirect) return ;
+
const canonicalOrigin = getEnv().PROD_ORIGIN;
const scheduleParams = { type: "roundtrip" as const, outbound, inbound };
const seoProps = buildScheduleSearchSeo(t, scheduleParams, locale, canonicalOrigin);
diff --git a/src/routes/[lang]/schedule/route/[params]/page.test.tsx b/src/routes/[lang]/schedule/route/[params]/page.test.tsx
new file mode 100644
index 00000000..c4e6b755
--- /dev/null
+++ b/src/routes/[lang]/schedule/route/[params]/page.test.tsx
@@ -0,0 +1,116 @@
+/**
+ * Tests for the one-way schedule route search page.
+ *
+ * Verifies that out-of-window dates redirect to /{locale}/schedule (TZ §4.1.2-R11),
+ * in-window dates render normally, and malformed URLs still produce 404.
+ *
+ * @vitest-environment jsdom
+ */
+
+import { describe, it, expect, vi, beforeEach, afterEach } from "vitest";
+import { render, screen } from "@testing-library/react";
+import React from "react";
+
+// Freeze clock: today = 2026-05-15. Schedule window: 2026-05-14 … 2027-04-10.
+beforeEach(() => {
+ vi.useFakeTimers();
+ vi.setSystemTime(new Date(2026, 4, 15, 12));
+});
+afterEach(() => {
+ vi.useRealTimers();
+});
+
+// --- mocks ---
+
+vi.mock("@/i18n/provider.js", () => ({
+ useTranslation: () => ({ t: (k: string) => k, i18n: { language: "ru" } }),
+}));
+
+vi.mock("@/env/index.js", () => ({
+ getEnv: () => ({ PROD_ORIGIN: "https://aeroflot.ru" }),
+}));
+
+vi.mock("@/ui/seo/SeoHead.js", () => ({
+ SeoHead: () => ,
+}));
+
+vi.mock("@/ui/errors/ErrorPage.js", () => ({
+ ErrorPage: ({ code }: { code: string }) => ,
+}));
+
+vi.mock("@/ui/flights/FlightListSkeleton.js", () => ({
+ FlightListSkeleton: () => ,
+}));
+
+vi.mock(
+ "@/features/schedule/components/ScheduleSearchPage.js",
+ () => ({ ScheduleSearchPage: () => }),
+);
+
+vi.mock("@/features/schedule/seo.js", () => ({
+ buildScheduleSearchSeo: () => ({}),
+}));
+
+const mockNavigate = vi.fn();
+vi.mock("@modern-js/runtime/router", () => ({
+ useParams: vi.fn(),
+ Navigate: ({ to }: { to: string }) => {
+ mockNavigate(to);
+ return ;
+ },
+}));
+
+import { useParams } from "@modern-js/runtime/router";
+import ScheduleRouteSearchPage from "./page.js";
+
+function renderWithParams(params: string, lang = "ru-ru") {
+ vi.mocked(useParams).mockReturnValue({ params, lang });
+ return render();
+}
+
+describe("ScheduleRouteSearchPage — date-window guard", () => {
+ beforeEach(() => {
+ mockNavigate.mockReset();
+ });
+
+ it("renders normally for an in-window date (today)", () => {
+ renderWithParams("SVO-LED-20260515-20260515");
+ expect(screen.getByTestId("seo-head")).toBeTruthy();
+ expect(screen.queryByTestId("navigate")).toBeNull();
+ });
+
+ it("renders normally for the earliest allowed date (today - 1)", () => {
+ renderWithParams("SVO-LED-20260514-20260514");
+ expect(screen.queryByTestId("navigate")).toBeNull();
+ });
+
+ it("renders normally for the latest allowed date (today + 330)", () => {
+ // 2026-05-15 + 330 = 2027-04-10
+ renderWithParams("SVO-LED-20270410-20270410");
+ expect(screen.queryByTestId("navigate")).toBeNull();
+ });
+
+ it("redirects when date is too late (today + 331)", () => {
+ // 2026-05-15 + 331 = 2027-04-11
+ renderWithParams("SVO-LED-20270411-20270411");
+ expect(screen.getByTestId("navigate")).toBeTruthy();
+ expect(mockNavigate).toHaveBeenCalledWith("/ru-ru/schedule");
+ });
+
+ it("redirects when date is too early (today - 2)", () => {
+ renderWithParams("SVO-LED-20260513-20260513");
+ expect(screen.getByTestId("navigate")).toBeTruthy();
+ expect(mockNavigate).toHaveBeenCalledWith("/ru-ru/schedule");
+ });
+
+ it("uses the route locale in the redirect path", () => {
+ renderWithParams("SVO-LED-20270411-20270411", "en-us");
+ expect(mockNavigate).toHaveBeenCalledWith("/en-us/schedule");
+ });
+
+ it("shows 404 for a malformed URL (missing date)", () => {
+ renderWithParams("SVO-LED");
+ expect(screen.getByTestId("error-404")).toBeTruthy();
+ expect(screen.queryByTestId("navigate")).toBeNull();
+ });
+});
diff --git a/src/routes/[lang]/schedule/route/[params]/page.tsx b/src/routes/[lang]/schedule/route/[params]/page.tsx
index d8e6ec89..d505acd2 100644
--- a/src/routes/[lang]/schedule/route/[params]/page.tsx
+++ b/src/routes/[lang]/schedule/route/[params]/page.tsx
@@ -6,7 +6,7 @@
*/
import { lazy, Suspense } from "react";
-import { useParams } from "@modern-js/runtime/router";
+import { useParams, Navigate } from "@modern-js/runtime/router";
import { useTranslation } from "@/i18n/provider.js";
import { parseScheduleRouteParams } from "@/features/schedule/url.js";
import { buildScheduleSearchSeo } from "@/features/schedule/seo.js";
@@ -14,6 +14,7 @@ import { SeoHead } from "@/ui/seo/SeoHead.js";
import { FlightListSkeleton } from "@/ui/flights/FlightListSkeleton.js";
import { ErrorPage } from "@/ui/errors/ErrorPage.js";
import { getEnv } from "@/env/index.js";
+import { scheduleDateRedirect } from "../../_guards.js";
const ScheduleSearchPage = lazy(() =>
import("@/features/schedule/components/ScheduleSearchPage.js").then(
@@ -30,6 +31,9 @@ export default function ScheduleRouteSearchPage(): JSX.Element {
if (!parsed) return ;
+ const redirect = scheduleDateRedirect(locale, parsed.dateFrom);
+ if (redirect) return ;
+
const canonicalOrigin = getEnv().PROD_ORIGIN;
const scheduleParams = { type: "route" as const, outbound: parsed };
const seoProps = buildScheduleSearchSeo(t, scheduleParams, locale, canonicalOrigin);