A recent incident in Egypt necessitating repairs to the ship - formerly Costa Europa - caused some concerns she would not be ready in time.
However, the vessel jumped into action last week ahead of schedule to help people unable to travel back to the UK because of the volcanic eruption in Iceland.
Thomson Dream Used to Transport Stranded Holidaymakers
The ship sailed to Palma and transported customers of both Thomson and First Choice from Majorca to Mainland Spain.
David Selby, Director of Thomson Cruises had this to say: "Over the past weeks we have been liaising very closely with Costa Cruises to keep up to date with the repairs on the ship. Today, we are happy to say Thomson Dream is sailing with our passengers on her maiden voyage around the Western Mediterranean, although not the first passengers.
Her help this week with the repatriation of customers has meant that she is starting her career in a very good light – long may it continue."
Thomson Dream Inaugural Cruise Sailed From Palma
The five night inaugural cruise sails from Palma and visited Livorno (for Florence and Pisa), Italy, Villefranche, France and Barcelona
before sailing back across to Palma.
Full details on the Thomson Dream or any other Thomson Cruise itinerary can be found at www.thomson.co.uk/cruise