Sample from my mileage summary to illustrate:

4-Aug-05 UA 0561 Q Class IAD to PDX 2,327 1,082 3,409


Flight 561 (a "direct flight") stopped in ORD (same gate/same plane).

IAD-ORD = 589 miles
ORD-PDX = 1,739 miles
Total = 2,328

If you look at flight 197 from IAD-PDX, you will see its 2,327 miles. I lost one mile as a result. No big deal on this route for the cost savings, but on some others it may make a difference.

FYI - I got seat assingments all the way through and one BP that I kept, even to deplane in ORD and get back on to continue to PDX.