This deal has expired, but be sure to check out our Top 25 deals of the week for savings on trips to destinations around the globe.

If you're thinking of taking a Mediterranean, Northern Europe, transatlantic, or Alaska cruise this spring or summer, the time to book is now. Princess Cruises has slashed fares on dozens of itineraries and departures, with savings of 50 percent or more on certain dates. All sale bookings also include an onboard credit of $25 or $50 per person (depending on cabin class).

The biggest savings can be found on the transatlantic sailings. A 14-night cruise from San Juan to London – with stops in New York, Halifax, Dublin, and Glasgow – that was $1,190 is now $499 per person. That's almost 60 percent off! We're also fond of the 6-night Scandinavia sailing round-trip from London for $699 (originally $1,399) as well as the 6-night Alaska sailings from Whittier, Alaska, to Vancouver for $499 (down from $924).

Certain dates and cabin classes are sold out, but there are still plenty of options to choose from. Note that these bookings are non-refundable. Head to www.princess.com/springsale.page for details.

For more great savings, check out our cruise deals.