(FARE GONE) UA/"Air One" JFK-FCO $296 a/i via "PL trick"
Modified PL... I found it via Kayak.com.... make sure that you search for the specific dates, choose "Air One" as the airline since that will trigger the "PL trick" and then hit "cheaptickets.com" on the sites to search...
confirmed for purchase $296 JFK-IAD-FCO-IAD-JFK for Feb 1-9 but I don't see any reason why this won't work for other dates. Just gotta make sure that your original fare shows both UA flights and Air One as a UA codeshare, if it shows all Air One then it won't work right.
But it's out there.. play around with it...