| São Tomé Aarhus | Central European Time | -01:00 |
| São Tomé Aarppookkara | India Standard Time | -05:30 |
| São Tomé Abanilla | Central European Time | -01:00 |
| São Tomé Aberlady | United Kingdom Time | 00:00 |
| São Tomé Abisko | Central European Time | -01:00 |
| São Tomé Abingdon | Eastern Time | 05:00 |
| São Tomé Abington | Eastern Time | 05:00 |
| São Tomé Aberdeen | Central Time | 06:00 |
| São Tomé Abeibara | Greenwich Mean Time | 00:00 |
| São Tomé Abbotsford | Eastern Australia Time | -11:00 |
| São Tomé Ajijic | Central Time | 06:00 |
| São Tomé Akköy | Turkey Time | -03:00 |
| São Tomé Al Aaroui | Western European Time | -01:00 |
| São Tomé Akrotiri | Eastern European Time | -02:00 |
| São Tomé Aigle | Central European Time | -01:00 |
| São Tomé Aiea | Hawaii-Aleutian Time | 10:00 |
| São Tomé Agurain | Central European Time | -01:00 |
| São Tomé Aitkenvale | Eastern Australia Time | -10:00 |
| São Tomé Airport West | Eastern Australia Time | -11:00 |
| São Tomé Air Itam | Malaysia Time | -08:00 |
| São Tomé Ajanta | India Standard Time | -05:30 |
| São Tomé Alba Adriatica | Central European Time | -01:00 |
| São Tomé Alavandipuram | India Standard Time | -05:30 |
| São Tomé Alaró | Central European Time | -01:00 |
| São Tomé Alaska | Atlantic Time | 04:00 |
| São Tomé Alaska | Central Time | 06:00 |
| São Tomé Alaska | Eastern Time | 05:00 |
| São Tomé Alata | Central European Time | -01:00 |
| São Tomé Alappuzha | India Standard Time | -05:30 |
| São Tomé Alamarathupatti | India Standard Time | -05:30 |
| São Tomé Alagón | Central European Time | -01:00 |
| São Tomé Alachua | Eastern Time | 05:00 |
| São Tomé Al-Qayrawan | Central European Time | -01:00 |
| São Tomé Al Mudayq | Gulf Standard Time | -04:00 |
| São Tomé Al Jaradiyah | Arabian Time | -03:00 |
| São Tomé Al-Mamurah | Central European Time | -01:00 |
| São Tomé Al Jaghbub | Eastern European Time | -02:00 |
| São Tomé Al Hofuf | Arabian Time | -03:00 |