Airfarewatchdog offers Alaska Airlines Winter Flights Sale as low as $57 roundtrip .
San Jose, CA, to/from Los Angeles $57 roundtrip
San Francisco to/from Portland PDX $118 roundtrip
San Francisco to/from Phoenix $138 roundtrip
San Diego to/from Austin $158 roundtrip
Seattle to/from Milwaukee $178 roundtrip
Boston to/from San Diego $197 roundtrip
Dallas to/from Seattle $198 roundtrip
Boston to/from San Francisco $238 roundtrip
New York City to/from Los Angeles $238 roundtrip
San Jose SJC to/from Kona $278 roundtrip
Los Angeles to Mazatlan, Mexico $298 roundtrip