Find Adults Only Resorts & Hotels in Duck Key, FL from $379

Name: Hawks Cay Resort
Price range: $379 total
Rating: 8

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Top Adults only hotels in Duck Key

61 Hawks Cay Blvd, Marathon, FL

$338 nightly

$379 total

Sep 5 - Sep 6

Total includes taxes and fees

8/10 Very Good! (1,009 reviews)

Reviewed on Aug 6, 2025

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Lowest nightly price found within the past 24 hours based on a 1 night stay for 2 adults. Prices and availability subject to change. Additional terms may apply.

Frequently asked questions

Are there any adult-only all-inclusive resorts in Duck Key?

You won't find any adult-only all-inclusive hotels or resorts in Duck Key. But there are still other options that will set hearts aflutter, such as Hampton Inn Marathon - Florida Keys. This romantic escape offers a spa tub and on-site watersports for you and your sweetheart to enjoy. Sun Outdoors Marathon is another top choice with couples. Here you can find amenities such as a terrace and windsurfing.

How can I find cheap adults-only hotels in Duck Key?

Expedia is here to help you easily locate cheap adults-only hotels in Duck Key. Simply try out our handy filter tool to select star rating, amenities and budget to refine your search and lock in the best stay in a couple of clicks.

From what age can you stay in an adult-only hotel in Duck Key?

Many adult-only hotels and resorts in Duck Key require guests to be 16, 18 or 21. Age restrictions can differ across properties, so be sure to check the rules. Ready for an exciting grown-up vacation? Whether you're two people or a dozen, celebrating a wedding, honeymoon or birthday, Expedia has the ideal adult-only resort or hotel to suit your needs.

Are all adult-only resorts all-inclusive in Duck Key?

If you only want to stay at a hotel or resort where practically everything you need is included in the cost of the room, try our "all-inclusive" filter. This will display suitable adult-only all-inclusive retreats in Duck Key that typically include your drinks, food and the room, on-site activities and daily entertainment. Check out the resort you're thinking about to find out what you get for your money.

Why book your adults-only hotel in Duck Key with Expedia?

With competitive rates and a fantastic range of properties in Duck Key, Expedia is your one-stop shop for an adults-only escape. Stick to the budget and opt for a comfy motel, or spoil your darling to a romantic getaway in a stylish hotel.

When is the best time to stay at an adult-only all-inclusive resort in Duck Key?

Factors like the weather, your budget and personal travel style will help determine the best time to stay at an adult-only all-inclusive hotel in Duck Key. Peak season typically includes bigger crowds and a higher price tag, but plenty of excitement. If you'd rather steer clear of the masses, low season is cheaper and quieter. Don't want the weather to dampen your spirits? Check the forecast before you go. Whatever time of year you choose, Expedia can help you find an adult-only hotel or resort that suits you perfectly.

Can I cancel or change my adult-only resort booking?

It is possible to cancel or change your booking, but check the details in your itinerary or visit Expedia's Trips portal to find out what rules apply. Whether you'll get charged a fee depends on the type of adult-only resort or hotel booking you made. Haven't decided on your Duck Key retreat yet? Search for adult-only properties that allow a full refund — because things don't always go according to plan!

Top Duck Key Hotel Reviews

Hawks Cay Resort

10/10 Excellent

"This was our first time here. The property is beautiful! The kids LOVED playing at the main pool, lagoon & other pool w/ pirate ship splash pad. Our only complaint is the water in all these areas is very warm except the pool by the pirate ship. Maybe when they build the new water slide area they will include a system that keeps the water cool & refreshing. Food & drinks were delicious but also expensive. We mostly ordered from the main pool tiki bar/grill. Jacob & Tomas from Turkey were so friendly & provided excellent service! We tried Salt & Ash for a nice fancy dinner & were not disappointed. Breakfast in the cafe always had a long line so be prepared. They accidentally had us listed as taking our food to go even though we did not request that. They gave us a number to place on our table but the food never came out & sat at the counter forever until we finally inquired as to the wait. We assumed it was taking long bc they were so busy. So that was a bit disappointing. We had the family oasis room w/ bunk beds which was perfect for us. There isn’t a view (looks out to the back of a building), but that didn’t bother us since we were barely in our room. Beds were comfortable, the AC was cold & the shower hot. We spent 3 nights there & didn’t leave the property except for one time to have dinner at Lazy Days in Islamorada which was so good. Though there are some areas that can be improved, overall we had a wonderful trip & look forward to coming back."

Lime Tree Bay Resort

10/10 Excellent

"Its a nice place with lots of potenial. The staff is friendly and the place is quiet and relaxing. A bar near the pool would improve the experience. Since people has to walk almost to the street to ask for a drink. Rennovations to fix that are in place, which is a plus. The rooms would need some updates too. The bathroom sink was poorly clean and a floor too. But rooms are very confortable, just need a little much to be perfect. We enjoyed our stay, best trip so far to the keys. "