Ending today, United Airlines offers select last minute weekend roundtrip fares in the U.S. with prices starting at $167.20. (Click on "United Airlines" in the top line to see this sale; all taxes are included.) That's the lowest price we could find for select routes by $245. This price is valid on flights departing from Los Angeles, CA, (LAX) with arrival in Las Vegas, NV, (LAS) on February 28 with return on March 2. Book this travel deal today for outbound travel on February 27 and 28 with return flights on March 2 and 3. Click here to see more routes.