United Airlines offers select United Airlines roundtrip fares on 41 routes nationwide with prices starting at $196.20. (On the DealBase landing page, click on "United Airlines" in the top line to see this sale.) That's the lowest price we could find for select routes by $27. This price is valid on flights departing from Newark, NJ, (EWR) with arrival in Atlanta, GA, (ATL) on September 23 and return on September 30.