The aggregate rating of Costa Deliziosa is build on scorse given by the following portals:
| Aug / 24 | Sep / 24 | Oct / 24 | ||
| cruisetimetables.com | 3.0 / 83 | 3.2 / 83 | 3.2 / 84 | |
| seascanner.com | 7.4 / 95 | 7.3 / 96 | 7.3 / 97 | |
| cruisemapper.com | 4.0 / 1 | 4.0 / 1 | 4.0 / 1 | |
| cruiseline.com | / | 3.4 / 110 | 3.4 / 110 | |
| cruisedirect.com | 3.7 / 31 | 3.73 / 31 | 3.73 / 31 |
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