I was the FO in LWS one morning when a nonrev FA informed us that the gate agents weren't letting on a SWA Jumpseater. I ran in, told them to put the delay on me if we were late, but to get him on. I used the restroom while in the terminal then went back out. We blocked out 1 min late... I got a call the next day from CP's office. That's Horizon for sure. I was asked specifically about the jumpseater. I claimed the delay was because I felt ill before push and had to use the airport bathroom, and just happened to see the SWA guy when I went in. I could hear the defeat in CP's voice after that answer.