Here's My Kitty Girl:
In the early aughts I used to work on the Big Island of Hawaii, and lived on Oahu; so I had a small apartment in Hilo, and would commute home on weekends. After I’d been there for about a year, Kitty Girl consented to share my apartment and keep me company on those lonely week nights.
Since she didn’t want to be alone on weekends she would accompany me on the flight home. The airline would let her travel in her carrier as carryon baggage, and all the TSA folks were on first name basis with her. So Kitty Girl has more frequent flier miles than most people!