Queen Elizabeth had been due to sail from 19 July, but the ship will instead resume sailing from Southampton on 13 August as part of what Cunard president Simon Palethorpe described as a "revised schedule" of UK coastal voyages.
Palethorpe hailed the line’s Covid precautions, which he said had kept the line’s crew Covid-free.
"These protocols, of which we are very proud, have proven to be very effective," said Palethorpe. "We had no cases of Covid-19 in over 5,000 crew members until last month when a small number of cases were identified among new crew boarding the ship.