Buses from Bangkok (Morchit), an 8-hour journey, arrive at the BKS station in the city.
Buses depart at least once per hour after 11AM to Nong Khai (20 baht, 1 hour, non-airconditioned 3rd class) on the Lao border. Buses from Nong Khai may drop you off north of the city. Follow the locals and hop on the waiting #6 songthaew to the bus station or take a tuk-tuk.
There are six express buses a day direct to the Morning Market in Vientiane (80 baht, 2 hours, air-con 1st class departures at 8AM, 10:30AM, 11:30AM, 2PM, 4PM, 6PM). These cross-border buses will carry passengers who have not obtained their Lao visas in advance, but may not wait long enough at the border for a visa on arrival to be applied for and issued. This isn't a problem when the queues are short, but at busy times passengers who don't already have their visas may be left behind and have to continue by local bus or tuk-tuk.
The Most Frequently Asked Travel Questions about Udon Thani
Where To Stay & Best Hotels in Udon Thani - updated May 2024
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