Summer Sale Stay Longer and Play Longer with the fantastic Hilton Caribbean Hotels and Resorts sale. For a limited time, your summer experiences will get even better with: 4th Night FREE, $100 resort credit per room per stay, and Kids stay FREE. Full terms and conditions. And what's more, Register for free and stay by August 31 to earn your choice of Double HHonors Points or Double airline Miles. Only with Hilton guests get Best Rates Guaranteed (or we'll match it and give $50 back), HHonors Points, and e-check in with room selection. Check the full Terms and Conditions for this offer.