Published on Tuesday, January 13, 2015 by Kathy McCabe Starting in May, United Airlines will begin nonstop summer service from Chicago to Rome. Flights commence May 16 at a frequency of five flights per week until June 3, then daily until August 17 and six times a week until Sept. 23. “United operates more nonstop trans-Atlantic service from Chicago O'Hare than any other airline, and these new flights to Rome are a...