Celebrity's Summer Sale is the rare cruise promo where the headline number is actually the good part: your second guest sails at 75% off, plus up to $650 in extra savings per stateroom on longer voyages, and select sailings add a $100 bonus on top. Book it under All Included and your drinks package and onboard Wi-Fi come baked in — the two add-ons that quietly inflate a 'cheaper' fare on other lines. It works across the Caribbean, Europe, Alaska and beyond on Celebrity's Edge- and Solstice-class ships, which punch well above their price for design and food. The catch is the calendar: this one closes August 31.

Celebrity is my go-to when someone wants the polish of a luxury line without the luxury-line price, and 75% off the second fare is the single biggest lever on a couple's total cost. If your dates are flexible, let me price a 7-night Eastern Caribbean against a Greek Isles sailing — the All Included math usually lands closer than people expect, and I'll make sure you're on the right ship and in the right cabin class.