Put on your thinking caps GWS: Can you think of some good excuses?

We are planning on moving out of state as soon as one of us gets a job. Obviously there are problems because we already have jobs. The biggest problem is interviewing, I had to turn down an interview with UPS today because the wanted me to come in tomorrow, which is too short notice. But the problem is inevitable. I can't tell my boss, "Oh hey, yeah I hate this job and am planning on moving soon because I can go to school for free in this other State, so, I'll be interviewing with other companies and you can just deal with it", without expecting to get fired. So what would you do? Gimme sweet lies...