The mileage required is determined by the program through which you redeem, not by the airlines operating the flights. The amount UA would require is irrelevant, because you cannot transfer to UA, but you you may be able to fly on UA.
If you have dates in mind it makes sense to begin by checking to see which airlines have award seat availability. You might do with with a tool like this one:
http://beta.awardtravelr.com/
I do not have specific dates in mind. But it will be sometime in the fall of 2014. I looked at the website you sent, doesn't seem to be any DTW-TSN flights on One World or Skyteam. Which I'm sure is not true.
Last edited by TOMFORD; Aug 13, 2013 at 8:38 am