I was hoping to use Southwest's mobile boarding pass for my trip. I checked in on my phone and it said I would still be required to have a paper boarding pass? As far as i'm aware this is supposed to be available for all airports now. Anyone else had this occur? I'm curious now about the return from Las Vegas. I have a printer here at home so it's not really a big deal (for the departure) but I was excited about the fact that i wouldn't need to worry about obtaining a boarding pass in Las Vegas. I'm flying out of Lambert if anyone has any first hand experience they'd like to share.