The ship will sail seven-night itineraries out of Barcelona between May and October, 2015.
The move comes on the heels of Royal Caribbean's announcement that its newest Quantum-class ship, Anthem of the Seas, will replace Independence of the Seas in Southampton, sailing from the UK port during the summer following its 2015 launch.
"I think what [relocating the two ships] shows is there's an appetite for cruising within the UK. We've seen growth in the last five or six years, and I think Royal have been at the forefront," Royal Caribbean's' managing director for the UK and Ireland, Stuart Leven, told Cruise Critic.
Calling Allure of the Seas "The newest destination in the Med.," Leven said the line expects Allure to draw passengers from around the world, in addition to those from the UK and Europe.
Beginning May 3, 2015, Allure of the Seas will sail 7-night cruises from Barcelona calling at Palma de Mallorca, Marseilles, La Spezia for Florence and Pisa, Civitavecchia for Rome, and Naples. Cruisers will also have the option to travel to Rome and join the ship in Civitavecchia for a week-long cruise starting and ending in the Italian port. Allure will continue to sail Caribbean itineraries during the northern hemisphere's winter months.
--by Jamey Bergman, UK Production Editor