All Boating Charters
- Sip and Sea Charleston
- Siren – 60' Iconic Luxury Yacht
- Sirena Moris
- Sirena – Splav & Brod
- Sirigos Yachting
- Sirius Fun Experience
- Sisi Boating Experiences
- Six Shooter Charters
- Skadar Lake – Boat Cruise
- Skarpina Budva
- Skinny Dipn Charters
- Skipjack by Amberjack-Snorkel/Sunsets/Whale
- Skipper Allan Sea Excursions
- Skipper Charters
- Skipperdan Boat Ltd
- Skirtchaser Charters
- Skopelos Rib Private Cruises
- Sky Blue Reef Tours
- Sky Walker Yachts – 96 FT Caliente
- Sky Walker Yachts – C-62
- Sky Walker Yachts – S-60 Infinity
- Sky Walker Yachts – X-63 Amie
- Sky Walker Yachts – С-52 Sky Walker
- SlackTyde Charters
- Slice O Life Charter and Cruise LLC
- Slick Calm Charters
- Smile Boats – Kattum K30
- Smokin Hooks
- Smooth Sailing Of Miami
- Snap Decision Charters
- Snooky Tours *Private personalized tours*
- Snorkel &. Turtle Adventure on 43'
- Snorkel Raya Tours
- Snorkel/Shelling Eco Tour
- Snorkeling Trip With Tamarindo Surf & Tours
- Snorkeling With Sea Turtles
- Snorkeling, fishing, Beach Day
- SoFlo Charters
- SoMax Fishing
- Sol & Sal
- Solara Maldives
- SoleMare LLC
- Soleil Sport Fishing – Boat Tours
- Solevela Sailing Yacht Charter Go One
- Solmar Aegina Villa & Yacht
- Solo Good
- Solrise Cruises – Sail La Vie
- Solé Watersports – Private Excursions
- Something Fishy Charters
- Somewhere – Ultimate Catamaran Expedition
- Sonny's Boat Tours and Charters
- Sorrento Sea Service – Siren
- Sorta Salty Charters
- Soundside Tours
- South Cruise Adventures
- South FL Charters
- South Florida Tiki Charters
- South Flow Charters
- South Jersey Outfitters
- South Ole Sails – Beneteau Oceanis Clipper 41
- South Ole Sails – Jet Ski
- South Ole Sails – Quicksilver 755
- South Padre Fishing Guide
- Southern Angler Fishing Charters
- Southern Angler Fishing Charters
- Southern Angler Fishing Charters
- Southern Angler Fishing Charters
- Southern Belle Charter
- Southern California Adventure, Inc
- Southern Slots Charter Co
- Southern Sons Charters
- Southern Sun Guides
- Southern Tauk Charters
- Southern Voyage Eco/Sunset Tours
- Southport Jetski Tours
- Southwest Shorelines
- Southwest Sportfishing
- Sozopol Boat Tours
- SpaceX Bay Tour (not launch days)
- Spanish Wells Island Charters
- Spark Waves Group – Speed Boat "Selena"
- Sparus Boats - Luxury Motor Yacht Colnago 38
- Sparus Boats - Luxury Motor Yacht Colnago 45
- Sparus Boats - Rib Boat Marlin
- Speartime Luxury Charters Barbados
- Speed Boat Albatross
- Speedboat Maria
- Speedboat Phi Phi and Maya Bay Tour
- Speedboat Prasitporn Pattaya
- Speedboat Tours Tivat
- Speranza 40 – Island Hopping Tour
- Sphynx BCN
- Spindrift Charters – Grand Cayman
- Spinnaker Sailing SF
- Spinnaker Sailing SF – J/105 FAST & FUN!
- Spirit Of La Paz – Private Chaters
- Splash Time Luxury Yacht
- Split Boat Tours
- Split Sea Tours
- SpongeBob Kayak Ecotours