All Boating Charters
- Secret Cays Bahamas
- Seek N Fishing Charter
- Serenity Charters TCI
- SerenityBoatCharters BlueLagoon,Comino & Gozo
- Set Sail Tours
- Seven Day’s Snorkeling
- Seven Star Dinner Cruise
- Shaka in San Carlos
- Shallow Water Experience LLC
- Sharkcana Yachts – Private Yacht Excursions
- Sharky's Charters
- Shark’s Tours
- Shearwater Charters
- Shockwave Charters
- Shoki Charters
- Shooter Dog Cruises
- Shore Service
- Shore Thing Charters OCNJ
- Shore-Thing Charters
- Short Skirts Sportfishing
- Shotime Charters
- SiP Travel – Blue Cave Adventure
- SiP Travel – Boka Bay Tour
- Sicily Fishing Charter
- Sicily Yachting Club
- Sidekick 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
- Sirigos yachting
- Sisi Boating Experiences
- Six Shooter Charters
- Sjay's Adventure
- Skadar Lake – Boat Cruise
- Skarpina Budva
- Skinny Dipn Charters
- Skipper Charters
- Skirtchaser Charters
- Skyway Fishing Tours
- SlackTyde Charters
- Slick Calm Charters
- Smile Boats – Kattum K30
- 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
- Solmar Aegina Villa & Yacht
- Solé Watersports – Private Tour: Up to 24
- Something Fishy Charters
- Sondevela SL
- Sorrento Sea Service – Siren
- Sorta Salty Charters
- Soundside Tours
- South Cruise Adventures
- South Flow Charters
- South Jersey Outfitters
- South Padre Fishing Guide
- 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
- Southern Voyage Eco/Sunset Tours
- 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