The two hours is safe bet. I also notice that Las Vegas airport tends to be busy over the weekends so it is safe to add another 30 mn during tbe weekends. Good luck.
Two hrs should be fine! If it's a festive time you may be earlier!
The general idea would be to arrive at the airport about two hours prior to flight departure for domestic travel and three hours for international travel. This allows time for parking and shuttle transportation, airline check-in, obtaining a boarding pass, and going through the security screening process, which includes screening of your carry-on baggage. You can save time by having your boarding pass already printed, not having to park your own car (taking a rideshare or Taxi), etc.
2 hours prior to departing
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