Try LAS to BWI (Baltimore) for $188 plus some taxes ( www.travelocity.com )and do the bus or Amtrak to NYC. BWI to NYC via Septa, Marta, Marc etc (ie the local commuter trains) should be less than $20. It would be rare to find LAS to the east coast less than $188. Good luck!

MisterNice

ps: IMHO the clean-up to clean-out ratio is 1:10