| Flight Bangkok → Vientiane | Direct flights DMK/BKK -> VTE (around 4-6 flights a day from different airports): about 1 hr 10-20 min flight time. Then school pick up or local transport. | from about THB 3,500_ one way | Fastest and simplest; book early for better fares. |
| Direct train #133 | Bangkok Krung Thep Aphiwat 21:25 → Vientiane Khamsavath about 09:05. ETA at Sunshine School before 8 am. Then school pick up or local transport. ETA at Sunshine School before 10.30 am. | about THB 780–900 sleeper | Simplest overnight sleeper train option. |
| Train #25 to Nong Khai + border | Bangkok 20:25 → Nong Khai 06:25; tuk-tuk to Thai immigration, shuttle across Mekong, then Lao immigration. Then school pick | THB 780–1,000 sleeper + about THB 135–385 local transfers | Usually faster overnight sleeper train. |
| Tourist bus / van | Khao San Road area → Vientiane; often afternoon departure, next-early morning arrival in central Vientiane. Local transport to school | about US$42 / THB 1,500 | Allow a full travel day from Sangkhlaburi to Bangkok before overnight or flight travel to Vientiane. |
| Return by train | Direct #134 Vientiane 18:25 → Bangkok | similar sleeper fares: about THB 780–1,000 | Useful for Sunday evening or later departures. |
