I have done it a few times. Each time I did get direct -- non-stop -- flights, but I got the 5:05 a.m. or the 11:55 p.m. flight (I am exagerrating a bit, but not much) and the flights were about 70 percent full.
I SAVED at least 30 percent, maybe more like 40 -- have not done it for a couple of years.
So, you can save quite a bit, but you do have to be willing to take quirky times, maybe have several stops/connections, etc.
Just depends on how much you want to save $$$.
One caution, each time I did it, after the flight deal was sealed, they offered a dirt cheap car rental -- like $9 per day....really, really cheap....
But twice, the car rental place was not open when I needed to return the car at 3:30 a.m. and there was no "system" in place to handle that really.
Both times this was at ONT. I ended up leaving the car on the street (alley, actually) and dropped the keys through a door slot.
Avis and Hertz of course were open at that time
I was very uncomfortable about that but it has been a few years and have not heard anything yet.
