The line’s Summer at Sea voyages will take place onboard Queen Elizabeth from July to October and feature scenic cruises along the UK coastline between three and 12 nights.
Sailings will be exclusive to UK residents who have received two doses of a Covid-19 vaccine.
Cunard said its record-breaking day followed “a phenomenal response” to its Centenary World Voyages onboard Queen Mary 2 and Queen Victoria in 2023, which recently went on sale.