All Boating Charters
- SpongeBob Kayak Ecotours
- Sportfishing Maestro
- Sportsman Charters
- Sportsmans Adventure Charters
- Sporty, Spacious Deckboat With Lots Of Shade
- Spot Hunter Fishing Guide Services
- Spot Tail Fishing And Tours
- Spot-On Charters
- Springflow DOO
- Spronk Catamarans
- Squid Row Charters and Boat Tours
- St. Pete Beach Boat Tour
- St. Pete Sport Fishing Boat Tours
- Stay Fishy - Miami Water Experience
- Stay Salty Charters
- Steal Your Fish Charters, LLC
- Stefan
- Stella Charters
- Stelluna Family Friendly Adventures
- Steph's Charters II
- Steph's Charters – I
- Steph's Charters – III
- Steph's Charters – IV
- Stewart’s Sportfishing and Charters
- Stingray City Cayman Islands
- Stockholm Boat Tour – Gustavus
- Stockholm boat tour | Private boat trips
- Storm Rider Fishing Adventures
- Strawhat Charters
- Strea Charters Aruba
- Stroupe Boat and Fishing Charters
- Subwing Costa Rica
- Sufishiente Sportfishing
- Sugar Daddy Boat
- Suite del Mar
- Summer Hunter Fishing Charters
- Summer Wind Chicago Boat Rental Co.
- Sun & Fun Large Group Pontoon + Add-on Boats
- Sun Fun FTL
- Sun King Charters
- Sun Odyssey 490 – ADAMASTOS
- Sun Rays
- SunGhada Boat Tour
- SunKissed Charters
- Suncat Malta Charters – Comino Adventure
- Suncat Malta Charters – Laura S
- Suncat Malta Charters – Nea S
- Suncat Malta Charters – Valentina S
- Sunchaser Watersports
- Suncoast Island Adventures!
- Suncoast Marine Tours
- Suncoast Oasis Boat Tours
- Suncrew
- Sundancer 46' with Water Mat – Deja Vu
- Suneeta Sxm – Private Boat Charter
- Sunfish Yachting
- Sunny Adventures SRL – Marcelle 1
- Sunny Adventures – Margaritas
- Sunny Adventures – PicaFlor
- Sunny Bay Cruise & Charter
- Sunny Charter – Gozzo Apreamare 100
- Sunny City Tours
- Sunny Day Charters
- Sunny Day Family Charters
- Sunny Life Boat Tours
- Sunrise Sorrento – Acquamarina 32ft
- Sunrise Sorrento – Apreamare 35ft
- Sunrise Sorrento – Jeranto 28ft
- Sunrise Sorrento – Lancia Aprea 42
- Sunrise Sorrento – Libeccio 38ft
- Sunrise Sorrento – Princess V55
- Sunseeker 48 – Watch Me
- Sunseeker 55' for up to 12 guest!
- Sunseeker Predator 60' for up to 12 guest!
- Sunset Boat Cruises
- Sunset Boat Tours
- Sunset Cruise SWFL
- Sunset Fishing Zadar
- Sunset Horizons Dolphin & Beach Tours
- Sunset Sailing Algarve
- Sunset Sailing Snorkeling
- Sunset Watersports Key West – Jet Ski Tours
- Sunset Watersports Key West – Sandbar & Kayak
- Sunset Watersports Key West – Sunset Sail
- Sunset and Dolphin Tours Complimentary Bev.
- Sunset in the Real catcher
- Sunset with Drinks & Snacks
- Sunshine Charters
- Sunshine Charters
- Sunshine Watersports & Tours
- Sunshine Watersports Boat Charter
- Sunwave Cruises – Nireus
- Sunwave Cruises – Sessa
- Sunwave Cruises – infinity
- Super Express Excursion
- Super Mini Yacht Cruises
- Super Yacht Charter
- Supernova Yachts Charter
- Supernova Yachts Charter – Hatteras Vogue
- Supernova Yachts Charter – May One