Also bookable on Viator
The same city on Viator (Tripadvisor's marketplace), top rated first: a third place to compare dates and prices.
Prices run from EUR6 to EUR1125, and half of the 18 priced listings cost EUR124 or less. Most take 2 hours to 7 hours. The best reviewed with at least 100 reviews is Catamaran Alghero, Catamaran Sailing Day Trip (4.9 from 148 reviews).
For the operators we researched and recommend, see our food tours and cooking classes in Alghero, or the experiences overview.