Originally Posted by soitgoes
Both Studentuniverse and STA Travel are hit-or-miss. Sometimes they have great fares, sometimes they are they same as regular fares, and sometimes they are higher than regular fares. They're still worth checking, because one never knows which site/booking method will be the cheapest.
Worth checking, but I'll note that I've never personally found a cheaper fare at either site than those on kayak.com. (I've mostly been checking for the LHR-ORD roundtrip though, so it's possible that they just don't have any, or many, student deals on that route.)