What are the best cities to fly to for a one-day visa run from Thailand to get a 30-day stamp?

In response to a question about the best city for a one-day trip out of Thailand to obtain a 30-day visa stamp, several options were suggested by the community. Kuala Lumpur and Penang emerged as popular choices due to low flight costs and visa exemptions for many nationalities. Other recommended destinations included Siem Reap and Vientiane, with assorted comments about the experiences, costs, and travel logistics involved. The conversation also highlighted the potential risks and requirements, suggesting that travelers consider booking flights that allow for same-day returns to avoid complications with Thai immigration.