Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Montgomery, Alabama to San Jose as you normally would.
There are currently 5+ open flights from Montgomery, Alabama to San Jose within the next 7 days for less than $800.
These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Montgomery Dannelly Field Airport to San Jose Airport flight would often be abbreviated as a MGM to SJC flight.