I'm trying to get from Kansas City to the Bay Area (one-way) and not finding a decently-priced flight at the right time. Where else can I look?

I need to go after midnight Saturday and arrive by 10am-ish on Sunday (August 9–10th). I’ve checked Kayak and Southwest (and Jetblue, which doesn’t fly to KC), but for some reason I’m not seeing any red-eyes or really early morning flights, and most of the morning flights get there at 11am or later. Where else should I look? There are Southwest and United flights getting there around 10am (but for ~$100 more)—are there other sites where I can find these for cheaper? What’s a good way to look for special sales and deals?

[note: I’m open on airports, but it seems SF or OAK would be best to get to Marin by mid-day – there are some cheaper flights to SJ, but then with the added travel time it’s no better]