Quick question, as a US citizen how many times per year may one enter the kingdom on a 'visa on arrival' via international air travel? Thanks in advance!
TLDR : Answer Summary
A US citizen cannot use a Visa on Arrival (VOA) but can enter Thailand under a visa-exempt status. There is no official rule on how many times one can enter Thailand on a visa exemption per year; it's up to the discretion of the immigration officer at entry. However, entering via land borders as a visa exempt is limited to twice per year. Frequent entries may raise questions from immigration officials, potentially resulting in denial of entry.