Yes, there are multiple flights from Bangkok Intl to Roberts Field for under ฿ 36,023. The cheapest flight booked recently is on United Airlines for just ฿ 34,432, but on average you can expect to pay ฿ 40,015.
There are no direct flights from Bangkok Intl to Roberts Field, but Cheapflights can provide you with all the information you need to find the fastest route with the fewest stops.
A quick flight from Bangkok Intl to Roberts Field can take about 28h 37m. KLM provides one of the quickest options available for as low as ฿ 51,063. Both multi-stop and direct flights can be found to your destination and back.
Currently priced at ฿ 34,432, United Airlines will fly you from Bangkok Intl to Roberts Field and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on KLM for as low as ฿ 51,063.