When flying from Omaha to Binghamton, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Omaha Eppley Airfield Airport to Binghamton Broome County Airport flight would often be abbreviated as a OMA to BGM flight.