 | Robinson Club Quinta da Ria Hotel Algarve | 4.0 star rating | 285 | Tavira |
 | Roca Belmonte Apartamentos Hotel Algarve | 3.0 star rating | 18 | Albufeira |
 | Rocamar Exclusive Hotel & Spa Algarve | 4.0 star rating | 88 | Albufeira |
 | Rocha Brava Village Resort Algarve | 4.0 star rating | 100 | Carvoeiro |
| Rural Capela das Artes Hotel Algarve | 3.0 star rating | 30 | Armacao de Pera |
 | Sagres Time Apartamentos Hotel Algarve | 4.0 star rating | 40 | Sagres |
 | Salema Beach Village Hotel Algarve | 4.0 star rating | 114 | Salema |
 | Salgados Dunas Suites Hotel Algarve | 5.0 star rating | 155 | Albufeira |
 | Salgados Palace Hotel Algarve | 5.0 star rating | 228 | Albufeira |
 | Salgados Palm Village Apartments & Suites Hotel Algarve | 4.0 star rating | 283 | Albufeira |
 | Salgados Vila das Lagoas Hotel Algarve | Aparthotel 4* | 124 | Albufeira |
 | Santa Catarina Hotel Algarve | 3.0 star rating | 69 | Praia da Rocha |
 | Santa Eulália Hotel Apartamento & Spa Algarve | Aparthotel 4* | 130 | Albufeira |
 | Santa Luzia Brisa Hotel Algarve | Aparthotel 2* | 1 | Tavira |
 | Santa Luzia Mar Hotel Algarve | Apartment 2nd Category | 1 | Tavira |
 | Santa Luzia Residence Hotel Algarve | Apartment 2nd Category | 1 | Tavira |
| Santa Teresinha Hotel Algarve | 3.0 star rating | 11 | Alvor |
 | Sao Rafael Atlantico Hotel Algarve | 5.0 star rating | 149 | Albufeira |
 | Sao Rafael Guest House Hotel Algarve | Without Official Category | 6 | Albufeira |
 | Sao Rafael Suites Hotel Algarve | 5.0 star rating | 101 | Albufeira |
 | Senhora da Rocha Hotel Algarve | 3.0 star rating | 30 | Armacao de Pera |
 | Sensimar Falesia Atlantic Hotel Algarve | 4.0 star rating | 349 | Albufeira |
 | Sensimar Lagos Hotel Algarve | 5.0 star rating | 220 | Lagos |
 | Sereia da Oura Hotel Algarve | 3.0 star rating | 28 | Albufeira |
 | Silchoro Apartamentos Turisticos Hotel Algarve | Aparthotel 3* | 135 | Albufeira |
 | Silmar Hotel Algarve | 2.0 star rating | 40 | Albufeira |
 | Solar de Mos Hotel Algarve | 3.0 star rating | 15 | Lagos |
 | Solar de Sao Joao Hotel Algarve | 3.0 star rating | 75 | Albufeira |
 | Sol a Sul Apartments Hotel Algarve | 3.0 star rating | 11 | Albufeira |
 | Soldoiro Hotel Algarve | 3.0 star rating | 90 | Albufeira |
 | Sol e Mar Hotel Algarve | 4.0 star rating | 74 | Albufeira |
| Solgarve Hotel Algarve | 3.0 star rating | 18 | Quarteira |
 | Sollagos Studios Hotel Algarve | 3.0 star rating | 18 | Lagos |
| Solmonte Hotel Algarve | 3.0 star rating | 100 | Portimao |
| Squash Club Hotel Algarve | Aparthotel 3* | 71 | Portimao |
 | Stay Hotel Faro Centro Algarve | 3.0 star rating | 60 | Faro |
 | Studio 17 By Atlantichoice Hotel Algarve | 4.0 star rating | 65 | Portimao |
 | Suites Alba Resort e Spa Algarve | Resort | 50 | Carvoeiro |
 | Sunset Village Hotel Algarve | 4.0 star rating | 17 | Armacao de Pera |
| Tavira Garden Hotel Algarve | 3.0 star rating | 50 | Tavira |
 | Tavira Inn / Casa Do Rio Hotel Algarve | 3.0 star rating | 5 | Tavira |
 | Terracos de Cabanas Hotel Algarve | Apartment 2nd Category | 1 | Tavira |
 | Terra Estreita Hotel Algarve | Apartment 2nd Category | 1 | Tavira |
 | The Crest Hotel Algarve | 4.0 star rating | 10 | Quinta do Lago |
 | The Lake Resort Algarve | 5.0 star rating | 192 | Vilamoura |
 | The Residences at Victoria Hotel Algarve | 5.0 star rating | 145 | Vilamoura |
| The Residences at Victoria Hotel Algarve | 3.0 star rating | 145 | Vilamoura |
 | Tivoli Carvoeiro Hotel Algarve | 5.0 star rating | 293 | Carvoeiro |
 | Tivoli Lagos Hotel Algarve | 4.0 star rating | 324 | Lagos |
 | Tivoli Marina Portimão Hotel Algarve | 4.0 star rating | 196 | Praia da Rocha |