Every so often I'd get a good fare going in the wrong direction - passenger was going east at the end of my day, and I'd have to backtrack empty to return the cab on the west side of the valley to the next driver. It was 94 miles to get back to the Valley from Globe...
Depends on how much time you spend on the freeway. For me, a typical 12-hour shift covered about 200 miles. Some days I didn't work the full 12 hours; other days I 'got lucky' and had to cover a lot of ground.
One of my better fares was a guy who'd pissed off his girlfriend by (probably) getting obnoxiously drunk at the Lakers/Suns game... It was 89 miles to get him home, then I had to drive 94 miles to get the cab back to the day driver:
https://goo.gl/maps/4xFsvJtHzLK2
That story was at the close of this kuro5hin.org (RIP) diary:
http://www.taxiwars.org/2012/04/22-degrees-of-intoxication.h...