Fare of the Day: Chicago, IL (ORD) to Oakland, CA (OAK) $200 RT, including all taxes on American Airlines/Alaska codeshare.
Many summer dates are blacked out on this fare, but you can find availability in early May and then again in the Fall months. This fare is available any day of the week with a 330-day travel period. No minumum stay requirement, 21-day advance purchase restriction.
Found via Cheaptickets.com