Yes, a day trip from Mallorca to Menorca is possible, especially if you take the fast ferry from Alcúdia to Ciutadella. With a crossing time of around 1 hour and 15 minutes, you will have plenty of time to explore Menorca's main attractions, such as the picturesque town of Ciutadella, beaches, or historical sites. However, if you opt for the longer Palma to Mahón route, the travel time is significantly longer, making a day trip less practical. The Alcúdia to Ciutadella route offers more flexibility for short visits.