diff --git a/lib/demo/__tests__/fixtures.test.ts b/lib/demo/__tests__/fixtures.test.ts
index 5531a479b..0619b748e 100644
--- a/lib/demo/__tests__/fixtures.test.ts
+++ b/lib/demo/__tests__/fixtures.test.ts
@@ -30,13 +30,16 @@ import { MAILBOX_PRESETS } from '@/lib/jmap/share-rights';
 import { principalLabel, shareRecipientNames } from '@/hooks/use-share-recipient-labels';
 import { checkAvailabilityAccess, lookUpAvailability } from '@/lib/jmap/free-busy';
 import { availabilityFor } from '@/components/calendar/participant-availability';
-import { demoAt } from '../demo-utils';
+import { demoAt, demoISODate } from '../demo-utils';
 import type { BusyPeriod } from '@/lib/jmap/types';
 import { useRecoveryStore } from '@/stores/recovery-store';
 import { SUPPORT_TAGS } from '../fixtures/shared-metadata';
 import { SIGNED_EMAIL_ID, SIGNED_TEXT } from '../fixtures/signed';
 import { INVOICE_BLOB, INVOICE_FILE, INVOICE_TOTAL, createSpreehostInvoiceXml } from '../fixtures/invoice';
 import { INVOICE_EMAIL_ID } from '../fixtures/supplier';
+import { FLIGHT_DAY, FLIGHT_EMAIL_ID, FLIGHT_REFERENCE, FLIGHT_SENDER, createFlightReservation } from '../fixtures/travel';
+import { getStructuredMailTrust, structuredHtmlPart } from '@/lib/structured-mail/trust';
+import { loadAirportZones, readStructuredMailDetailed, resolveCards } from '@/lib/structured-mail';
 import { loadSharedTags, sharedTagsKey, useSharedTagsStore, saveSharedTags } from '@/stores/shared-tags-store';
 
 const PUBLIC = path.resolve(__dirname, '..', '..', '..', 'public');
@@ -570,4 +573,26 @@ describe('demo fixtures: audience screenshots', () => {
     expect(one('IssueDate') < today).toBe(true);
     expect(one('DueDate') > today).toBe(true);
   });
+
+  it('Tagus Air\'s booking mail carries a flight the booking card trusts and shows', async () => {
+    const client = new DemoJMAPClient('work');
+    const email = (await client.getEmail(FLIGHT_EMAIL_ID))!;
+    expect(email.mailboxIds[MB.inbox]).toBe(true);
+    expect(email.from?.[0].email).toBe(FLIGHT_SENDER.email);
+    expect(email.headers?.['Authentication-Results']).toContain('dkim=pass header.d=tagusair.example');
+    const html = structuredHtmlPart(email)!.value;
+    expect(html).toContain(`<script type="application/ld+json">${JSON.stringify(createFlightReservation())}</script>`);
+    // What the viewer's useStructuredMail does: trust, read, resolve the airport zones.
+    expect(getStructuredMailTrust(email)).toEqual({ trusted: true });
+    const { cards } = readStructuredMailDetailed(html, { mailDate: new Date(email.sentAt ?? email.receivedAt) });
+    const [card] = resolveCards(cards, await loadAirportZones());
+    expect(card?.kind).toBe('flight');
+    if (card?.kind !== 'flight') return;
+    expect(card.reference).toBe(FLIGHT_REFERENCE);
+    expect(card.links.checkin?.url).toContain('tagusair.example');
+    const [leg] = card.legs;
+    expect([leg.carrierCode, leg.number, leg.departure.place.code, leg.arrival?.place.code]).toEqual(['TQ', '482', 'LIS', 'BER']);
+    expect(leg.departure.at).toMatchObject({ date: demoISODate(FLIGHT_DAY).slice(0, 10), time: '17:10:00', zone: 'Europe/Lisbon' });
+    expect(leg.arrival?.at).toMatchObject({ time: '21:35:00', zone: 'Europe/Berlin' });
+  });
 });
diff --git a/lib/demo/demo-data.ts b/lib/demo/demo-data.ts
index 8aa3bf016..84763bc66 100644
--- a/lib/demo/demo-data.ts
+++ b/lib/demo/demo-data.ts
@@ -4,6 +4,7 @@ import { createDemoEmails } from './fixtures/emails';
 import { createDemoSupportEmails } from './fixtures/support';
 import { createDemoSignedEmails } from './fixtures/signed';
 import { createDemoSupplierEmails } from './fixtures/supplier';
+import { createDemoTravelEmails } from './fixtures/travel';
 import { createDemoPersonalEmails, createDemoPersonalIdentities } from './fixtures/personal';
 import { createDemoContacts, createDemoAddressBooks, createDemoPersonalContacts, createDemoPersonalAddressBooks } from './fixtures/contacts';
 import { createDemoCalendars, createDemoCalendarEvents } from './fixtures/calendars';
@@ -108,7 +109,7 @@ export function getDemoData(profile: DemoProfile = 'work'): DemoData {
     self: { name: NORA.name, email: NORA.email },
     mailboxes: withShares(createDemoMailboxes(), createDemoMailboxShares()),
     sharedMailboxes: { [SUPPORT_ACCOUNT_ID]: { name: SUPPORT_ACCOUNT_NAME, mailboxes: createDemoSupportMailboxes() } },
-    emails: [...createDemoEmails(), ...createDemoSignedEmails(), ...createDemoSupplierEmails(), ...createDemoSupportEmails()],
+    emails: [...createDemoEmails(), ...createDemoSignedEmails(), ...createDemoSupplierEmails(), ...createDemoTravelEmails(), ...createDemoSupportEmails()],
     contacts: createDemoContacts(),
     addressBooks: createDemoAddressBooks(),
     calendars: createDemoCalendars(),
diff --git a/lib/demo/fixtures/travel.ts b/lib/demo/fixtures/travel.ts
new file mode 100644
index 000000000..963561982
--- /dev/null
+++ b/lib/demo/fixtures/travel.ts
@@ -0,0 +1,83 @@
+/**
+ * Travel mail with booking markup: Tagus Air's confirmation of the evening
+ * flight home from Lisbon on the last day of Infra Summit (days 9 to 12 in
+ * fixtures/calendars.ts; the out-of-office in fixtures/vacation.ts runs
+ * until that evening). The HTML carries a schema.org FlightReservation as
+ * JSON-LD and the receiving server verified the sender, so the viewer shows
+ * a booking card above the message (lib/structured-mail).
+ */
+import type { Email } from '@/lib/jmap/types';
+import { demoISODate } from '../demo-utils';
+import { at, authPass, dayLabel, mail } from './mail';
+import { MB } from './mailboxes';
+import { NORA } from './people';
+
+export const FLIGHT_EMAIL_ID = 'demo-email-tagus-air';
+export const FLIGHT_SENDER = { name: 'Tagus Air', email: 'booking@tagusair.example' };
+export const FLIGHT_REFERENCE = 'K4TQ9M';
+/** The last summit day, relative to today. */
+export const FLIGHT_DAY = 12;
+
+const SITE = 'https://www.tagusair.example';
+
+/** What the airline's mail system puts into the HTML: a FlightReservation in local airport time. */
+export function createFlightReservation(): Record<string, unknown> {
+  return {
+    '@context': 'https://schema.org',
+    '@type': 'FlightReservation',
+    reservationNumber: FLIGHT_REFERENCE,
+    reservationStatus: 'https://schema.org/ReservationConfirmed',
+    underName: { '@type': 'Person', name: NORA.name },
+    reservationFor: {
+      '@type': 'Flight',
+      flightNumber: '482',
+      airline: { '@type': 'Airline', name: 'Tagus Air', iataCode: 'TQ' },
+      departureAirport: { '@type': 'Airport', name: 'Lisbon Humberto Delgado', iataCode: 'LIS' },
+      departureTime: demoISODate(FLIGHT_DAY, 17, 10),
+      arrivalAirport: { '@type': 'Airport', name: 'Berlin Brandenburg', iataCode: 'BER' },
+      arrivalTime: demoISODate(FLIGHT_DAY, 21, 35),
+    },
+    airplaneSeat: '7C',
+    checkinUrl: `${SITE}/check-in?pnr=${FLIGHT_REFERENCE}`,
+    modifyReservationUrl: `${SITE}/my-trips/${FLIGHT_REFERENCE}`,
+  };
+}
+
+export function createDemoTravelEmails(): Email[] {
+  const day = dayLabel(FLIGHT_DAY);
+  const row = (label: string, value: string, first = false) => {
+    const border = first ? '' : 'border-top:1px solid #f0f0f0;';
+    return `<tr><td style="padding:10px 0;color:#666;${border}">${label}</td><td style="padding:10px 0;text-align:right;${border}">${value}</td></tr>`;
+  };
+  const html = `<script type="application/ld+json">${JSON.stringify(createFlightReservation())}</script>`
+    + '<div style="max-width:560px;margin:0 auto;font-family:-apple-system,sans-serif">'
+    + '<p style="font-size:18px;font-weight:700;color:#0b5f8a;margin:0 0 16px">Tagus Air</p>'
+    + '<h1 style="font-size:20px;margin:0 0 4px">Your booking is confirmed</h1>'
+    + `<p style="color:#555;margin:0 0 20px">Lisbon (LIS) to Berlin (BER), ${day}</p>`
+    + '<table style="width:100%;border-top:1px solid #eee">'
+    + row('Flight', 'TQ 482', true)
+    + row('Departs', `${day}, 17:10, Lisbon (LIS)`)
+    + row('Arrives', `${day}, 21:35, Berlin (BER)`)
+    + row('Passenger', `${NORA.name}, seat 7C, Economy`)
+    + row('Booking reference', `<strong>${FLIGHT_REFERENCE}</strong>`)
+    + '</table>'
+    + `<p style="margin:24px 0"><a href="${SITE}/check-in?pnr=${FLIGHT_REFERENCE}" style="background:#0b5f8a;color:#fff;padding:10px 18px;border-radius:6px;text-decoration:none">Check in online</a></p>`
+    + '<p style="color:#666;font-size:13px">Online check-in opens 24 hours before departure. One cabin bag up to 8 kg is included.</p>'
+    + '</div>';
+  return [
+    {
+      ...mail({
+        id: FLIGHT_EMAIL_ID, mailbox: MB.inbox, date: at(1, 18, 20),
+        from: FLIGHT_SENDER,
+        subject: `Booking confirmed ${FLIGHT_REFERENCE}: Lisbon to Berlin`,
+        text: `Your booking is confirmed.\n\nTQ 482 · ${day} · Lisbon (LIS) 17:10 to Berlin (BER) 21:35\n\nPassenger: ${NORA.name} · Seat 7C · Economy\nBooking reference: ${FLIGHT_REFERENCE}\n\nCheck in online from 24 hours before departure: ${SITE}/check-in?pnr=${FLIGHT_REFERENCE}\n\nOne cabin bag up to 8 kg is included.\n\nTagus Air`,
+        html,
+        keywords: ['$label:travel'],
+        headers: authPass('tagusair.example'),
+      }),
+      // The Authentication-Results header came from the receiving MX, not a
+      // submission hop; a real fetch reads that from the Received order.
+      authenticationResultsOnReceipt: true,
+    },
+  ];
+}