According to kayak.com, the non-stop flt from OKC-SFO leaves at 5:42 a.m, arrives at 7:28 a.m. - there's a time change to factor in. That will have them going down the peninsula in the heart of the traffic, and around the south San Jose bottleneck at the worst time of day. Silicon Valley's rush hour doesn't end as early as rush hour in other areas; geeks have more flexible work hours.