Yahoo Sports Reports: USC, UCLA Planning to Leave Pac-12 for Big Ten
sports.yahoo.com
sports.yahoo.com
For college football, the most watched college sport, there has been a consolidation of sorts going on, with some schools jumping to different conferences. Which is good for some schools, bad for others. This leads to a situation where if you don't jump, maybe others will (game theory-ish).
Generally schools in a conference are relatively close to each other, say 2 with in hour flight. With this move USC and UCLA and the other teams in the conference which are in the midwest and east coast will be having a lot more 5+ hour flights.
UCLA and USC getting an extra $20+ million per year pays for a lot of airline flights.
It doesn't end with that, either. They'll be invited to join the [1] Big Ten Academic Alliance, where all the schools work together to share resources and reduce costs. This is serious money for the schools too.