How often can I enter Thailand by flight with a tourist visa and what are the visa run options?

I have been here in Thailand for a couple years now - on tourist visa. I do like Robert describes, proof of accomondation, proof of funds, onward travel (when required). I leave Thailand 1-2 weeks every visa run. Travel by plane, always get visa -- I have not had any troubles. Many others like me, the same. Some people have issues - but some people make themselves problems. - Enjoy your travels

Official there is NO limit on how many times you can enter Thailand other than the two Visa Exempt Entries at land crossings a calendar year for 54 countries. The longer your history of living in Thailand and using Visa Exempt Entry and Tourist Visa the bigger the chance to get questioned at Immigration Check point. Prepare yourself with the 20.000 Thb or equivalent currency in CASH, proof of accommodation and onward travel. Next to this it could be good to have proof of funds coming in from abroad to avoid the suspicion of working inside Thailand.