Tuesday will be my first time flying out of LAS, and my first time flying Delta in probably 20 years. But that's besides the point.
I am taking an early morning flight (6am) and was planning on arriving 60 minutes before takeoff because of that instead of the usual 90... but I just noticed that I have to take a tram to get to the gates so I may need to bite the bullet and go to bed early.
Can I go through security at Terminal 3 (which looks closer via tram to D gates) even though my flight is departing from Terminal 1?