The details

I checked orbitz, priceline, expedia, and travelocity for ticket pricing. The cheapest was about $375 for layovers that would last hours. Having a nonstop flight is the one extravegence I'll pay whatever it costs to get. I'm 6'5. Being on a plane just sucks and is cramped, I just want to get it over with, and it will kill your whole day. Here is a breakdown of the cheapest non stop flights for each agent (per person):
ORBITZ $493 - US Airways
PRICELINE $486 - US Airways
EXPEDIA - $492 - US Airways
TRAVELOCITY - $493 - US Airways
SOUTHWEST - $412.30

Southwest really does have a whole lot of savings! Their website is easy to use, and I booked the car rental and hotel while on there. I didn't save any more (I checked the car rental website before booking to make sure) but it was just so convenient to use their forms.

Depart PHILADELPHIA INTERNATIONAL (PHL) at 9:35 AM
Arrive in LAS VEGAS N (LAS) at 12:20 PM
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Depart LAS VEGAS NV (LAS) at 10:45 AM
Arrive in PHILADELPHIA INTERNATIONA (PHL) at 6:35 PM