Today only, United Airlines offers select nationwide roundtrip fares with prices starting at $122.20. (Click on "United Airlines" in the top line to see this sale; all taxes are included.) That's the lowest price we could find for select routes by $22. This price is valid on flights departing from Newark, NJ, (EWR) with arrival in Boston, MA, (BOS) on May 10 with return on May 17. Book this travel deal today for travel from April 13 through June 5. Click here to see more routes.