United Airlines offers select nationwide roundtrip fares with prices starting at $136.20, as seen on Travelzoo. That's the lowest current rate we could find for select routes by $13. This price is valid on flights departing from Los Angeles, CA, (LAX) to New San Francisco, CA, (SFO) on September 13 with return on September 15. A 14-day advance purchase and roundtrip purchase is required. Book this travel deal by August 28 for travel September through March 5, 2015. Click here to see more routes.