Help my ping fluctuates when I'm in games?

So first off I'm going to say that I'm on OSX with a wireless connection. As well I went on a 2 week vacation, before the vacation all was fine, then the second I got back on my ping went crazy. So when I play games, such as League of Legends, minecraft, and CoD, about every 10 seconds my ping will jump really high. I have tried some things suggested already on the web but none of those helped. It is very annoying.