I was able to add to cart to see if it'd let me, hadn't gone any further than that as I certainly don't WANT a 2-stop-each-way ticket... in this example it has the Bur-SEA first, SEA-SFO main, and SFO-HND first outbound, and then HND-SFO first, SFO-SEA main, SEA-BUR first return, showing 140k miles and $84.25 cost in my cart.