Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Charlottesville to San José del Cabo as you normally would.
These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Charlottesville Albemarle Airport to San José del Cabo Los Cabos Airport flight would often be abbreviated as a CHO to SJD flight.