| Luton Saint Ives | United Kingdom Time | 00:00 |
| Luton Saint James | Western Australia Time | -07:00 |
| Luton Saint James City | Eastern Time | 05:00 |
| Luton Saint-Jean-Cap-Ferrat | Central European Time | -01:00 |
| Luton Saint Johns | Eastern Time | 05:00 |
| Luton Saint John | Central Time | 06:00 |
| Luton Saint-Hubert | Central European Time | -01:00 |
| Luton Santa Catarina | Central Time | 06:00 |
| Luton Sant Josep de sa Talaia | Central European Time | -01:00 |
| Luton Sant Miquel de Campmajor | Central European Time | -01:00 |
| Luton Santa Ana | Central Time | 07:00 |
| Luton Santa Ana | Mexican Pacific Time | 08:00 |
| Luton Sennfeld | Central European Time | -01:00 |
| Luton Senden | Central European Time | -01:00 |
| Luton Sendra | India Standard Time | -04:30 |
| Luton Senegal | Peru Time | 06:00 |
| Luton Sengurichi | India Standard Time | -04:30 |
| Luton Sankari | India Standard Time | -04:30 |
| Luton Sanibel | Eastern Time | 05:00 |
| Luton Sankt Olof | Central European Time | -01:00 |
| Luton Sankt Blasien | Central European Time | -01:00 |
| Luton Sankt Ibb | Central European Time | -01:00 |
| Luton Sans Souci | Eastern Australia Time | -09:00 |
| Luton Saint Leonards | Eastern Australia Time | -09:00 |
| Luton Saint Leonards | United Kingdom Time | 00:00 |
| Luton Saint-Joseph-de-Beauce | Eastern Time | 05:00 |
| Luton Saint-Joseph-du-Lac | Eastern Time | 05:00 |
| Luton Saint-Leonard | Eastern Time | 05:00 |
| Luton Saint Julian's | Central European Time | -01:00 |
| Luton Saint-Just-Saint-Rambert | Central European Time | -01:00 |
| Luton Sângeorgiu de Mureș | Eastern European Time | -02:00 |
| Luton Saint-Martin-de-Belleville | Central European Time | -01:00 |
| Luton Saint-Marcel-Campes | Central European Time | -01:00 |
| Luton Saint Margrethen | Central European Time | -01:00 |
| Luton Saint Lucia | Eastern Australia Time | -09:00 |
| Luton Yzeure | Central European Time | -01:00 |
| Luton Zachary | Central Time | 06:00 |
| Luton Zahara de los Atunes | Central European Time | -01:00 |