Would like to know outbound tour operator and charter flights to/from Thailand to China and rates.

Hi, which city in China you would like to visit? As I know TravelChinaGuide is one of the biggest travel agents in China and you can turn to them. Also, you may visit the following page for reference: https://www.travelchinaguide.com/tour/default.htm For the flight from Thailand to China, you can search the flight schedules on the page by yourself after having your arrival city in mind.