Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Bangkok to Columbia, Missouri as you normally would.
Related info for your journey
Useful info, stats and facts about Bangkok to Columbia flights.
For a flight from Bangkok to Columbia, you will be flying into Columbia Regional. Columbia Regional (COU) is just 17.8 km from the centre vof the city. Columbia Regional is the only Columbia airport and it handles 0 inbound flights from Bangkok per day. 0 airlines have flights to Columbia Regional from Bangkok on a regular basis.
Bangkok Suvarnabhumi Airport is BKK and Columbia Regional Airport is COU. These codes are created by the International Air Transport Association (IATA) and airlines use them to identify the departing and arrival airports in the flight routes they service. Ready for more IATA code knowledge? These are related airports for your current travel destination: Bangkok Don Mueang Intl Airport (DMK), Rayong Utapao Rayong Pattaya Airport (UTP), Hua Hin Airport (HHQ).