maybe I am doing this wrong...

I just tried IAD-SEA 20MAY and got no qualifying seats. I did it twice, once for business and once for first.

Do I need to do it segment by segment? IAD-SFO, SFO-SEA?

This is the first time I am trying to book award travel on ual.com, I have used aa.com quite a bit and had luck with that......

Thanks.