I was looking at the Thai embassy in Washington DC web site and was curious about the “O” visa being married to aThai info. It appears that with that visa you can only stay in country for 90 days even if it is good for 1 year. A visa run every 90 days? Is that what you have to do? That would push me to the “O-A” over 50 just so I would not have to do a visa run every 90days. What a hassle.
TLDR : Answer Summary
The Non-Immigrant O visa allows a maximum stay of 90 days per entry, even though it is valid for one year. This means holders must do a visa run to renew their stay every 90 days. In contrast, the Non-Immigrant O-A visa offers a longer stay of one year per entry without the need for frequent visa runs, although registration with immigration is required if staying longer than 90 days.