The average bus between Udon Thani and Mae Sai takes 23h and the fastest bus takes 20h 40m. The bus service runs several times per day from Udon Thani to Mae Sai. The journey time may be longer on weekends and holidays; use the search form on this page to search for a specific travel date.
Buses run twice daily between Udon Thani and Mae Sai. The earliest departure is at 2:45 PM in the afternoon, and the last departure from Udon Thani is at 9:00 PM which arrives into Mae Sai at 5:40 PM. All services require a transfer, and take on average 23h. The schedules shown below are for the next available departures.
Arrives next day

25h 20m • 1 change
Arrives next day

20h 40m • 1 change
Arrives next day

25h 20m • 1 change
Arrives next day

20h 40m • 1 change
Arrives next day

25h 20m • 1 change
Arrives next day

20h 40m • 1 change
Want to know about travelling from Udon Thani to Mae Sai? We have put together a list of the most frequently asked questions from our users such as: What is the cheapest mode of transport? What is the quickest option? How much do tickets usually cost? and many more.
No, there is no direct bus from Udon Thani to Mae Sai. However, there are services departing from Udon Thani station and arriving at Mae Sai station via Chiang Mai. The journey, including transfers, takes approximately 23h.
Udon Thani to Mae Sai bus services, operated by Phetprasert Tour, depart from Udon Thani station.
Udon Thani to Mae Sai bus services, operated by Phetprasert Tour, arrive at Mae Sai station.
Book your Udon Thani to Mae Sai bus tickets online with Phetprasert Tour and Greenbus Thailand.
The distance between Udon Thani and Mae Sai is 454.1 km. The road distance is 975 km.
You can take a bus from Udon Thani to Mae Sai via Chiang Mai in around 17h 50m.