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			I just got back from Las Vegas last night.  We left Thursday evening around 6:30.  For our departure we had to wait about 20-25 minutes in the Customs line, and another 30 or so for security.  On arrival this morning at 12:30 am, we had to wait about 15 minutes in customs.
 It's definitely not crazy though.  If you get to the airport 3 hours before you flight leaves, you'll have lots of time to sit around and have a drink / coffee.  2 Hours before your flight leaves should still get you through without being pressed for time, but I don't like leaving things up to chance.  It seems customs and security all use one line for outbound flights, so if there were 5 or 6 flights leaving at similar times, you could be waiting a lot longer.
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