United Airlines offers roundtrip flights to New York City from select cities in the U.S. with prices starting at $106.20, as provided by ShermansTravel. (Click on "United.com" in the main paragraph to see this sale; all taxes are included.) That's the lowest price we could find for select routes by $2. This price is valid on flights departing from Boston, MA, (BOS) with arrival in Newark, NJ, (EWR) on December 3 with return on December 9. Book this travel deal by October 31 for travel on select dates from December through January. Other notable deals: All prices, dates, and booking details were valid at the time of publication.