The problem with GA really is elsewhere. First, I am not instrument rated, and Monterey tends to have marine layer all the time. I suppose I can get into Salinas and drive, but... There may be some enroute weather, too. Second, the dispatch reliability of a piston single is really not all that great. And third, GA is slow. It's faster than driving, on average, and if you're flying a Mooney. But I remember sitting in SFO, my leg to Monterey in a geriatric EMB-120 being delayed by THREE HOURS, simply because the schedule was unrealistic to begin with, and the aircraft accrued a delay on every round-trip between MRY and SFO, so by the time I needed to fly it, it grew to 3 hours. So I sat there and thought: if I took the Arrow, I would still be somewhere near Vegas now. Even with United being jackasses this much, I would still arrive much later.
If you live in those miniature states out East, GA may not be prohibitely slow, but then you have IFR with ice 100 days a year. So it hardly works out either.
-- Pete