I feel like a novice for making such a rookie oversight. But, I needed to get my kids up to Wisconsin for a week at the lake this summer. Using my US miles on US would have cost me 40K per child on US metal. So, I called US and they found seats on UA from Phoenix to Wisconsin with a connection through Cleveland. The best part, it was only 25K per person. The lesson I learned was - just because www.usairways.com shows reward seats for more than 25K roundtrip - it really is ok to ask US to find UA flights. It was great and because we cannot book UA reward seats on-line using US miles the call to US is free and they are great at working with you in getting a routing. (I am gold with US so the call is free anyway). TIP: If you are a dedicated US flyer, like I am, and the US web site says you need more miles you should call and ask them to find a United routing, it could save you miles in the long run!