The real question should be "is any site worse than PCLN/Hotwire?"

The answer is no.

If you do your Internet search and don't find any low fares, you might find it worthwhile to fly Vanguard on that route. No FF miles, no first class, no MRTC, and you will be on an ancient 737-200 (I think they phased out the DC-3's last week ) - but if rock-bottom cheapness is a priority, it's worth a look.