That's the best price for select routes by at least $20. Buy Now at DealBase Tips On the DealBase landing page, click "United Airlines" in the top line to see this sale. We found this price on flights departing from Chicago, IL (ORD) with arrival in Raleigh, NC (RDU) on November 19 and return on November 23.. All prices, dates, and booking details were valid at the time of publication. Book this travel deal by November 7 for travel from November 19 through November 29.