For travel over the weekend of St. Patrick's Day, fly nonstop from San Francisco to Newark for $301 roundtrip on Alaska.
Searching Alaska, we founds seats departing SFO on Friday, March 15, returning from EWR on Tuesday, March 19.
This is a regular economy fare. Basic economy for these dates is $241 roundtrip. You'll find even lower fares available for non-holiday midweek travel.
See our San Francisco SFO fare listings for a complete look at current fares.