Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Columbus to Decatur, Illinois as you normally would.
For a flight from Columbus to Decatur, you will be flying into Decatur Arpt. Decatur Arpt (DEC) is just 4.7 mi from the center of the city. Decatur Arpt is the only Decatur airport and it handles 0 inbound flights from Columbus per day. 0 airlines have flights to Decatur Arpt from Columbus on a regular basis.
CMH stands for Columbus Airport, while DEC stands for Decatur Arpt Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry. Ready for more IATA code knowledge? These are related airports for your current travel destination: Dayton Airport (DAY), Columbus Rickenbacker Airport (LCK), Cincinnati Airport (LUK), Parkersburg Wood County Airport (PKB), Lima Allen County Airport (AOH).