All Boating Charters
- Seanaval Nautica – Innisfree Classic Boat
- Searenity Jetcars Ocho Rios, Jamaica
- Searostrattus
- Seas 2 Trees Outdoors, LLC
- Seas N' Cays Cruises – 42' Summer Wind
- Seas N' Cays – 42' Double Decker Catamaran
- Seas The Day Boat Tours
- Seas The Day Destiny
- Seascape Algarve – Blueberry
- Seascape Algarve – Cranchi Mediterranee
- Seascape Charters
- Seashine Amalfi Coast Charter
- Seaside Napoli
- Seaspray
- Seatours Speed Boat – Barracuda 545
- Seatours Speed Boat – Cayman 585
- Seatours Speed Boat – Marinello Eden 22
- Seatours Speed Boat – Marinello Eden 590
- Seatours – Bavaria Vision 46ft
- Seatours – Catamaran My Joy
- Seaventure Dubrovnik – Cap Camarat 6.5WA
- Seaventure Dubrovnik – Karnic SL 741
- Seawalker Excursions
- Seañorita 43ft Sea Ray Sundancer
- Second Generation Bay Boat Charters
- Second Generation Fishing Charters Key West
- Second Sport Charters
- Secret Cays Bahamas
- Secret Coast Fishing Charters
- Seek N Fishing Charter
- Semi-Sub Seychelles Ltd
- Sense Of Nature Safaris – Ali Boat Maun GT 80
- Serene Yachts – Princess Marya
- Serene Yachts – Sleek
- Serenity Boat Charters-Bluelagoon,Comino&Gozo
- Serenity Charters TCI
- Serenity Sea Tours
- Set 'Em Up Ecological Adventures
- Set Sail Tours
- Seven Day’s Snorkeling
- Seven Star Dinner Cruise
- Shaggy's Diving
- Shala River Tour from Komani Lake
- Shallow Water Experience LLC
- Shangri-la Yacht Rentals Vancouver – Dave
- Shangri-la Yacht Rentals Vancouver – Kane
- Shangri-la Yacht Rentals Vancouver – Maxum
- Sharkcana Yachts – Private Yacht Excursions
- Sharky's Charters
- Shark’s Tours
- Shearwater Charters
- Shell island tour
- Shelton's Charter Fishing
- Shockwave Charters
- Shoki Charters
- Shooter Dog Cruises
- Shore Chaos Charters
- 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
- Side Quest Charters
- Sidekick Charters
- Sidon Italian Yacht 44’ | Luxury Experience
- Sierra Surf House
- Siesta Boat Charters
- Siesta Cruise Boat Tours
- Siesta Key Snorkel
- Sightseeing, Booze Cruise
- Sightseeing,Booze,Sunset and Lake Boca Cruise
- Signature Island Charters
- Silvana Yacht
- 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
- Sinbad – Hanse 370
- 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 Moris
- Sirena – Splav & Brod
- Sirigos Yachting
- Sirius Fun Experience
- Sisi Boating Experiences
- Six Shooter Charters
- Skadar Lake 2h Boat Tour from Virpazar
- Skadar Lake 3h Tour to Kom Monastery
- Skadar Lake – Boat Cruise
- Skarpina Budva
- Skinny Dipn Charters