I have flown into LGB before. It's a very small airport with no jetways, so you have to deplane using stairs. Kinda fun.
Ooh I love that! My first flying memory was getting into Phoenix and deplaning by stairs (and the reaction of my lungs to that dry dry heat)...taking the ramp always feels like cheating to me!
LGB will get a try someday, it's been decided.
I really disliked ONT. It was cheapest, but then when figuring out how to get me and my son to Disney, I didn't look as far as I should have.
The supershuttle rate for me and my son *one way*, with Entertainment Book coupon, was about $50. I figured that SS was the same from any airport, so I didn't check that out.
Well, it was a LONG drive on a scarier-than-usual highway IMO, and I just hated that drive.
We didn't fly out of ONT (we went to San Diego after Disney and flew from there) so I don't know about security...but I remember (could be faulty) that baggage pickup was a very very long walk from the gate, and then the exit to the shuttles was at the "beginning" of the luggage carousels while our bags were at the furthest away carousles. Not ONT's fault, but it was all part of a bad experience.
When next I flew, I went into and out of SNA. Found out that the fare on SS is 10 bucks per person. AUGH.
Since hubby flew in separately from us (and he flew out separately too) we spent more total (I recently figured that out...I thought we still came out OK until I added hubby to the calculations) in airfare to ONT (and hubby leaving from ONT) plus the higher SS rate, than we would have spent with the higher airfare to SNA (and from for hubby) but much lower SS rate.
Be sure you're checking ALL the options, and don't just go by airfare alone.