The fastest and most comfortable way to travel by public transport from Luang Prabang to Nong Khai is to travel by train. The first stage of the journey from Luang Prabang to Vientiane is by high speed train. The second stage of the journey is on a slower Thai train, however, the journey from Vientiane to Nong Khai is very short.| Thailand Trains
At the moment you need to change trains in Vientiane to complete the journey from Nong Khai in Thailand to Luang Prabang in Laos. You also need to buy two separate tickets, one for each of the two train services.| Thailand Trains
By train the journey from Nong Khai to Vientiane is scheduled to take exactly 30 minutes.| Thailand Trains