I've been trying to find specifics on how to get from Mae Sai to Chiang Rai, and though many places state that there is frequent and inexpensive bus service between these two cities, I haven't been able to find any particulars.
Which companies service this route? Is there any direct service to the airport? Is there any way to view timetables or book this passage online? (Mae Sai to Chiang Rai OR Chiang Rai Airport, preferably)
Thank you for your help!