[Expired]U.S. to London @ United Airlines

• United Airlines offers U.S. to London flight sale, round trip from $379.
• Travel Date: Selected dates from January to Oct 2017
• Departure Cities: Boston(BOS), Oakland(OAK) New York(EWR), Los Angeles(LAX), San Francisco(SFO) 
• Priceline>> Expedia>> Orbitz>> 

For example: New York - London $379