S
- Sandals Resorts
- Sarah's Universe
- SASS Global Travel
- SCOTTEVEST/SeV
- Sea World
- Seralago Hotel & Suites
- Sheraton Hotels & Resorts
- Sherpani
- Signature Days
- Silver Legacy
- SilverJet
- Sinclairs Hotels & Resorts
- Site59
- Six Flags
- Sixt
- Skiset
- Sleep Inn
- SmartBargains.com
- Sol Melia
- Southwest Vacations
- Spirit Vacations
- Splendia
- SpringHill Suites
- STA Travel
- Staybridge Suites
- Sterling Hotels
- StudentCity.com
- Studio 6
- Summit Hotels & Resorts
- SunTrax
- Super8
- Surf to Ski Retreats
- Swiss International Air Lines
- Swissotel Hotels & Resorts