| Vientiane Abeibara | Greenwich Mean Time | 07:00 |
| Vientiane Abbotsford | Eastern Australia Time | -04:00 |
| Vientiane Amarante | Western European Time | 07:00 |
| Vientiane Amaravati | India Standard Time | 01:30 |
| Vientiane Amakusa | Japan Time | -02:00 |
| Vientiane Alzenau | Central European Time | 06:00 |
| Vientiane Alvor | Western European Time | 07:00 |
| Vientiane Alverca do Ribatejo | Western European Time | 07:00 |
| Vientiane Ambala Cantt | India Standard Time | 01:30 |
| Vientiane Ambler | Eastern Time | 12:00 |
| Vientiane Ambleside | United Kingdom Time | 07:00 |
| Vientiane America | Central European Time | 06:00 |
| Vientiane Altona | Eastern Australia Time | -04:00 |
| Vientiane Albisola Superiore | Central European Time | 06:00 |
| Vientiane Albert Park | Eastern Australia Time | -04:00 |
| Vientiane Alvarado | Central Time | 13:00 |
| Vientiane Altona North | Eastern Australia Time | -04:00 |
| Vientiane Altstätten | Central European Time | 06:00 |
| Vientiane Alba Adriatica | Central European Time | 06:00 |
| Vientiane Alaró | Central European Time | 06:00 |
| Vientiane Alavandipuram | India Standard Time | 01:30 |
| Vientiane Alaska | Atlantic Time | 11:00 |
| Vientiane Alaska | Central Time | 13:00 |
| Vientiane Alaska | Eastern Time | 12:00 |
| Vientiane Alata | Central European Time | 06:00 |
| Vientiane Alappuzha | India Standard Time | 01:30 |
| Vientiane Alamarathupatti | India Standard Time | 01:30 |
| Vientiane Ajijic | Central Time | 13:00 |
| Vientiane Al-Qayrawan | Central European Time | 06:00 |
| Vientiane Alachua | Eastern Time | 12:00 |
| Vientiane Alagón | Central European Time | 06:00 |
| Vientiane Aigle | Central European Time | 06:00 |
| Vientiane Aiea | Hawaii-Aleutian Time | 17:00 |
| Vientiane Agurain | Central European Time | 06:00 |
| Vientiane Aitkenvale | Eastern Australia Time | -03:00 |
| Vientiane Airport West | Eastern Australia Time | -04:00 |
| Vientiane Air Itam | Malaysia Time | -01:00 |
| Vientiane Ajanta | India Standard Time | 01:30 |