Four different available airports
SNA (aka Orange County or John Wayne) Closest at 12 miles, but often the most expensive
LBG, Long Beach, 14 miles-- tiny but nice, often lower priced on a par with LAX
LAX, big, crowded, at 35 miles the farthest away, often the cheapest flights in
ONT, Ontario, 35 miles away, not as crowded and you can sometimes find good deals
Check your airfare on all the airports with different available airlines. You might be surprised at the differences. Flying into SNA would cost us about $338, but LGB was $217.
HTH!