Like many airports that have expanded in fits and starts over the years SAN is broken up between 3 terminals terminals one and two and the commuter terminal for short flights to Los Angeles. Terminal one is a bit older and cramped especially if you go in the morning rush or fly on Southwest. Terminal two is a bit nicer but currently undergoing expansion construction until 2013-2014. Parking is via shuttle and you have several choices between private and operators associated with the airport. The big plus is that the airport is located 5-10 minutes from downtown.