All Boating Charters
- Southern Belle Charter
- Southern California Adventure, Inc
- Southern Slots Charter Co
- Southern Sons Charters
- Southern Sun Charters – Sun II
- Southern Sun Charters – Southern Sol
- Southern Sun Charters – Southern Sun
- 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
- Speed boat Antonija – Atlantic Marine 670
- Speed boat Antonija – Don Amon Negroni
- Speedboat Lana Omis
- 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 & Sun Comino Boat Trips
- Splash Time Water Sports & Tours
- Splash Wave Tours Belize
- Split Boat Tours
- Split Sea Tours
- SpongeBob Kayak Ecotours
- Sportfishing Maestro
- Sportsman Charters
- Sportsmans Paradise Adventures - Horse Tour
- Sporty, Spacious Deckboat With Lots Of Shade
- Spot Hunter Fishing Guide Services
- Spot Tail Fishing And Tours
- Spot-On Charters
- Springflow DOO
- Spronk Catamarans
- St. Law River Nature/Photography/Boat Tour!
- St. Pete Beach Boat Tour
- St. Pete Sport Fishing Boat Tours
- Starfish Blue Chip
- Stay Fishy - Miami Water Experience
- Stay Salty Charters
- Steal Your Fish Charters, LLC
- Stefan
- Stefanos Fishing Tours and Boat Trips
- Stella Charters
- Stellar Glamorous Sea - Private Catamaran
- Stelluna Family Friendly Adventures
- Steph's Charters II
- Steph's Charters – I
- Steph's Charters – III
- Steph's Charters – IV
- Stephanos Yacht Charters
- Stewart’s Sportfishing and Charters
- Stillwater Scenic Tours
- Stockholm Boat Tour – Roundtrip in Classic bi
- Stockholm boat tour | Private boat trips
- Stoked On Fishing 35
- Storm Rider Fishing Adventures
- Strawhat Charters
- Strea Charters Aruba
- StriperXtreme Cherokee Lake
- Stroupe Boat and Fishing Charters
- Stuart Sailing Charters
- Subwing Costa Rica
- 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
- Sun Rent Boat – Speedy Ocean 80
- 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