I have participated as a representative of the Aerothai core team in testing the exchange of aviation information in digital format in the MRTBO project. Trajectory-Based Operation or TBO is a new concept in air traffic management that transitions from voice communication to digital information exchange through automated systems. In this approach, Air Navigation Service Providers (ANSPs) and airlines plan their flights together along the route, through the exchange of necessary and beneficial information for decision making via interconnected automated systems. The Aerothai has developed a system to participate in testing and demonstrating flights following the TBO concept. Participating entities include the Federal Aviation Administration (FAA), the Japan Civil Aviation Bureau (JCAB), the Civil Aviation Authority of Singapore (CAAS), and Boeing. The demonstration flight started from Seattle to Tokyo, then flew from Tokyo via Bangkok to land in Singapore. Subsequently, it flew from Singapore to land in Bangkok and then flew back to Seattle. This demonstration is the first flight following the TBO concept that covers multiple regions. The demonstration results will be presented to the ICAO for information to be used in the development and standardization of both technical and practical aspects globally.