How is it kind of one-way? It's a perfect JFK-SFO-JFK round trip. As soon as you change direction in SFO, it stops being a one-way. Now JFK-PIT-MCI-ORD-MSP-DEN-SLC-LAS-SFO WOULD be a LONG one-way (although I think there are segment limitations to an upgrade), but as soon as you add SFO-LAS, even if you don't go beyond LAS, it's a round trip.