What time of year is airfare from Savannah, Georgia to Los Angeles at its lowest?|153020

My wife and I plan on spending about a week there. We won_t be requiring lodging, as we_ll be staying with family. We_re also willing to fly out of Jacksonville if it will save us a substantial amount of money.

From Savannah to LAX, $500
From Atlanta $350, you can get a deal for $278
From Jacksonville, $258 from southwest

Are these rates year-round?