All Boating Charters
- Seaside Napoli
- Seaspray
- Seawalker Excursions
- Seañorita 43ftSundancer w/Paddle&Inflatables
- Second Sport Charters
- Secret Cays Bahamas
- Seek N Fishing Charter
- Sensational Magic Charters
- Serenity Boat Charters–Bluelagoon,Comino&Gozo
- Seven Day’s Snorkeling
- 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
- Shore Thing Charters OCNJ
- Short Skirts Sportfishing
- Shotime Charters
- Sidekick Charters
- Sidestep Fiji
- Sierra Surf House
- Siesta Key Snorkel
- 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
- Singing Reel Charters
- Sip and Sea Charleston
- Sip and Sea Charleston
- Siren – 60' Iconic Luxury Yacht
- Sirena – Splav & Brod
- Six Shooter Charters
- Skinny Dipn Charters
- Skipper Charters
- Skirtchaser Charters
- SlackTyde Charters
- Slick Calm Charters
- Smokin Hooks
- Snap Decision Charters
- Snorkel/Shelling Eco Tour
- Snorkeling Trip With Tamarindo Surf & Tours
- Snorkeling With Sea Turtles
- SoFlo Charters
- SoMax Fishing
- Solé Watersports
- Something Fishy Charters
- Sorta Salty Charters
- Sorted Madeira Marlin Charters
- Sosua Party Boats
- South Cruise Adventures
- South Jersey Outfitters
- South Padre Fishing Guide
- Southeast Serenity - Classic Speedboat Advent
- Southern Angler Fishing Charters
- Southern Angler Fishing Charters
- Southern Angler Fishing Charters
- Southern Angler Fishing Charters
- Southern Belle Charters
- Southern California Adventure, Inc
- Southern Escapes
- Southern Slots Charter Co
- Southern Sons Charters
- Southern Sun Guides
- Southern Tauk Charters
- Southern Voyage Fishing Charters
- Southwest Sportfishing
- SpaceX Bay Tour - South Padre Island TX
- Sparus Boats - Luxury Motor Yacht Colnago 38
- Sparus Boats - Luxury Motor Yacht Colnago 45
- Sparus Boats - Rib Boat Marlin
- Speartime Luxury Charters Barbados
- Speedboat Tours Tivat
- Sphynx BCN
- Split Boat Travel
- Spot Hunter Fishing Guide Services
- Spot-On Charters
- 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
- Still Waters Charters
- Stockholm boat tour | Private boat trips
- Stolat Fishing LLC
- Storm Rider Fishing Adventures
- Strawhat Charters
- Sufishiente Sportfishing
- Summer Hunter Fishing Charters
- Sun Fun FTL
- Sun Rays