DO REQUIRE SNS for 20/25K: CO, NW, US
DON'T REQUIRE SNS for 25K: DL, AA, UA(?), AC(HAS 15k 'short-hauls.')
DO ALLOW A 'STOPOVER': AA (anywhere in 48USA

, only airline to allow 1 stopover AND 1 open-jaw for 25K

), DL & AC (on a generous list of alternate 'routings'), US (natural connecting cities only.)
NO STOPOVER ALLOWED: NW, UA. CO has a domestic award with stopover for 35K. I wonder if the SNS may be in the stopover city instead of the final destination.
[This message has been edited by Brendan (edited 01-31-2002).]