Redding, which is about a 2.5 hour drive away, might offer better options. The airport web site shows both Horizon and United Express flights.
http://ci.redding.ca.us/transeng/air...e_schedule.htm
Arcata also has United and Horizon service.
http://co.humboldt.ca.us/aviation/co...nformation.htm
Crescent City, 90 mins away, has United Express service.
Santa Rosa, about 4 hours away, with Horizon service, and then Medford, Oregon, which is served by 4 cariiers, which is 3.5 hours away, would also be close to drive from.
http://www.co.jackson.or.us/Page.asp?NavID=75