What Compensation Due?

About 2 weeks ago my flight from Atlanta to Barcelona was forced to return to Atlanta after about 1.5 hours out. Upon return, the flight was cancelled and rescheduled for the next evening. Delta provided us with a hotel room and two $12 meals each. I was a no show at my Barcelona hotel and bought another meal myself, for which I will make a travel insurance claim.

Is there other compensation from either the EU and/or the US for the 24 hour delay in my arrival in Barcelona. If so, how to I proceed?