Per Dan’s Deals, you can fly between Las Vegas and Philadelphia for only $79 each way throughout February in either direction. United is matching this deal as well, but you’ll have to connect on them and the cost comes to around $85 if you were to choose United.
You can book these flights on the US Airways site, and most of the non-stop flights have plenty of seats left. You can also credit these flights to your American Airlines account and earn AAdvantage miles.
If you are looking for some cheap flights to Vegas this is a great deal!