I hate to be disparaging about anything American as generally speaking Americans take criticism very very badly, but I'm going to. Domestic flights in America are ridiculously expensive and just terrible. In Europe there are several budget airlines that will get you to Greece or Spain or wherever for a very reasonable price. It won't be pretty but its a short flight and you'll have some money leftover for your trip. In the land of the brave & free, all the airlines are rubbish. They're all like Easy Jet or that kind of low standard but charge insane amounts of money for very poor service. A flight to New York from LA will be at least as much, if not more, than a flight from LA to London. That's just silly.
If you must fly with a domestic airline I would recommend Jet Blue. Again, it won't be cheap but the staff are always funny and helpful and they have a website and app that actually work quite well, which is very unusual.
I flew in to Burbank last night from New York and as we landed the flight attendant announced that there is no smoking at Burbank airport "or indeed anywhere in southern California" which raised a few eyebrows from the New Yorkers on board and got a few laughs from the rest of us.