All Boating Charters
- Sierra Surf House
- Siesta Cruise Boat Tours
- Siesta Key Snorkel
- Sightseeing, Booze Cruise
- Sightseeing,Booze,Sunset and Lake Boca Cruise
- Silver Thatch Watersports – Diver
- Silver Thatch Watersports – MB
- Silver Thatch Watersports – Silver Thatch II
- Silver Tuna Sport Fishing
- Simon Says Charters
- Sin Priza – Snorkeling Tour
- Singing Reel Charters
- Sip N Sea Charters – Fun In The Sun!
- Sip and Sea Charleston
- Sip and Sea Charleston
- Siren – 60' Iconic Luxury Yacht
- Sirena – Splav & Brod
- Sisi Boating Experiences
- Six Shooter Charters
- Sjays adventure
- Skadar Lake – Boat Cruise
- Skarpina Budva
- Skinny Dipn Charters
- Skipper Charters
- Skirtchaser Charters
- Skyway Fishing Tours
- SlackTyde Charters
- Slick Calm Charters
- Smokin Hooks
- Smooth Sailing Of Miami
- Snap Decision Charters
- Snorkel/Shelling Eco Tour
- Snorkeling Trip With Tamarindo Surf & Tours
- Snorkeling With Sea Turtles
- SoFlo Charters
- SoMax Fishing
- Soleil Sport Fishing – Boat Tours
- Solevela Yacht Charter
- Solé Watersports Private Tour: Up to 6
- Solé Watersports – Private Tour: Up to 24
- Something Fishy Charters
- Sorta Salty Charters
- Sortie Bateau 06
- Sosua Party Boats
- Soundside Tours
- South Cruise Adventures
- South Jersey Outfitters
- South Padre Fishing Guide
- Southeast Serenity – Speedboat Adventure
- Southern Angler Fishing Charters
- Southern Angler Fishing Charters
- Southern Angler Fishing Charters
- Southern Angler Fishing Charters
- Southern Belle Charters
- Southern California Adventure, Inc
- Southern Slots Charter Co
- Southern Sons Charters
- Southern Sun Guides
- Southern Tauk Charters
- Southwest Sportfishing
- Sozopol Boat Tours
- SpaceX Bay Tour - South Padre Island TX
- Spanish Wells Island Charters
- Sparus Boats - Luxury Motor Yacht Colnago 38
- Sparus Boats - Luxury Motor Yacht Colnago 45
- Sparus Boats - Rib Boat Marlin
- Sparviere Boat Tours – Relaxing Day In Capri
- Speartime Luxury Charters Barbados
- Speed Boat Albatross
- Speed Boat adventures
- Speedboat Maria
- Speedboat Tours Tivat
- Sphynx BCN
- Spindrift Charters – Grand Cayman
- Spiridakos Sailing Cruises
- Spirit Of La Paz – Private Chaters
- SpongeBob Kayak Ecotours
- Sportfishing Maestro
- Sportman Adventure Charters
- Sporty, Spacious Deckboat With Lots Of Shade
- Spot Hunter Fishing Guide Services
- Spot Tail Fishing And Tours
- Spot-On Charters
- St. Marks sandbar trip
- St. Pete Sport Fishing Boat Tours
- Stay Fishy - Miami Water Experience
- Stay Salty Charters
- Steal Your Fish Charters, LLC
- Stella Charters
- Stelluna Family Friendly Adventures
- Steph's Charters – I
- Steph's Charters – II
- Steph's Charters – III
- Steph's Charters – IV
- Stockholm boat tour | Private boat trips
- Storm Rider Fishing Adventures
- Strawhat Charters
- Sufishiente Sportfishing
- Summer Hunter Fishing Charters
- Sun Fun FTL