Originally Posted by
garykung
Yes.
Setting all status issues aside, UA does fly SFO-LHR nonstop. With AA, at least 1 stop is required unless booked as BA codeshare.
They're going to Italy, not London. LHR is a worse airport for connections (especially between different carriers when one must switch terminals) than some other major airports in Europe which could also get then to Italy within only one connection from SFO.