Are there airline travel discounts for teachers? if so, where can i find them?

Nope. The best way to get a less expensive ticket is to book it far in advance. Air tickets only go up in price the nearer it is to the flight. It is too late for booking flights to Europe at a lower cost for this summer, but get in touch with a travel agent to help you book at a better price for next summer. (By the way, summer 2012 tickets to London may not see much price break at all, due to the Queen's Jubilee.)