Thanks to the United ground team at LAS, and the UX crew for allowing me to board a flight at least 10 minutes after the door closed. I am certain the plane wasn't waiting for a pleb like me, but I am in appreciation.
I didn't get to the airport until after the end of boarding time. Cleared security, hopped on the tram, and rushed to the gate. I knew if I didn't try, I would have no chance in making the flight.