Does anyone on this site know how it would be possible for a Costa Rican passport holder to transit through Thailand on their way to Laos. I believe they need have a transit visa to transfer from DMK to BKK. Unfortunately it seems the Thai embassy in San Jose is no longer issuing visas, and there seems to be no way to do e-visa......
TLDR : Answer Summary
A Costa Rican passport holder cannot obtain a transit visa at DMK Airport for a transfer to BKK Airport. Instead, if they cannot enter Thailand on a visa-exempt basis, they must apply for a Tourist Visa (TR) before traveling.