Just a heads up for those arriving at Suvarnabhumi airport wanting to change money on arrival. The 1st photo is the exchange rate right now at the Kasikorn Bank booth at the top of the ramp from the airport link train in the basement. The second photo above is the exchange rate for the same bank down the ramp behind the train departures and arrivals. Here they offer the significantly better exchange rate as their rivals Super rich and Happy rich. These are the best rates you can get in the airport.
TLDR : Answer Summary
For expats arriving at Suvarnabhumi Airport in Thailand, it is important to be aware of the currency exchange rates available at the airport. The Kasikorn Bank booth at the top of the ramp offers a certain rate, but many commenters advise that better rates can be found at the Super Rich and Happy Rich booths located in the basement near the Airport Rail Link. While some users suggest avoiding airport exchanges entirely, others highlight that the rates in the basement are now competitive and often better than those found downtown. Overall, it's recommended to check multiple booths for the best rates before exchanging currency.