Similar pricing from DFW, including other UK destinations, on Star.
Lowest fare I found is DFW-EDI for mid-August for $872 on airfare.com for AC. Booking a single carrier itin, such as UA metal, starts at $905. Add about $25 more for open jaws with other destinations, such as LHR.
Great fare for travel through mid-June, starting again mid-August.
Gah it would be so nice if this worked the other way round - exactly what I'm missing for A3 gold