The average bus between Mae Sai and Udon Thani takes 26h 11m and the fastest bus takes 21h 45m. There is at least one bus per day from Mae Sai to Udon Thani. 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 once daily between Mae Sai and Udon Thani. The earliest departure is at 9:30 AM in the morning, and the last departure from Mae Sai is at 3:00 PM which arrives into Udon Thani at 10:45 PM. All services require a transfer, and take on average 26h 11m. The schedules shown below are for the next available departures.
Arrives next day

21h 45m • 1 change
Arrives next day

31h 45m • 1 change
Arrives next day

21h 45m • 1 change
Arrives next day

31h 45m • 1 change
Want to know about travelling from Mae Sai to Udon Thani? 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 Mae Sai to Udon Thani. However, there are services departing from Mae Sai station and arriving at Udon Thani station via Chiang Mai. The journey, including transfers, takes approximately 26h 11m.
Mae Sai to Udon Thani bus services, operated by Greenbus Thailand, depart from Mae Sai station.
Mae Sai to Udon Thani bus services, operated by Greenbus Thailand, arrive at Udon Thani station.
Book your Mae Sai to Udon Thani bus tickets online with Greenbus Thailand and Phetprasert Tour.
The distance between Mae Sai and Udon Thani is 454.1 km. The road distance is 972 km.
You can take a bus from Mae Sai to Udon Thani via Chiang Mai in around 17h 55m.