Update (9:15 am ET, April 23): This sale has been extended for bookings through Tuesday, April 24. 

For $699 per person, spend the summer cruising through the Greek Isles for 11 relaxing nights. Save $1000 on current per-person rates for this cruise aboard Royal Caribbean's Grandeur of the Seas.

Book by Friday, April 20, and get a $150 credit per cabin and a coupon booklet valued at more than $250.

Depart June 11 or July 2 (over July Fourth weekend) and sail roundtrip from Venice, Italy, to Montenegro, Croatia and two stops in Turkey. Then take in the juxtaposition of the white buildings and turquoise water in Athens, Mykonos and Santorini, Greece.

Or, for $849 per person, cruise roundtrip from Barcelona for 12 nights aboard the Serenade of the Seas. Depending on departure date, ports of call include Monte Carlo, Monaco; Rome, Venice and Naples, Italy; Croatia; Turkey and Greece. Depart June 10 or 22.

Note: Taxes are an additional $110-$119 per person depending on itinerary.

Click here for more information on this deal, which is part of a larger sale from CruCon Cruise Outlet.