Flights, times, and fares is deceptively hard to get right. There's a reason there are only a few providers.
Edit: Ahh. If you're saying DDG could get by with just flights and times, and no fares, I see what you mean. That seems to be reflected in the pricing for the FlightStats product vs Google's flight/times/fares API pricing, yes. Parity with Google search requires fares though.