Curious, checking some flights and found that on 8/27 there is am IAH-ONT flight using 752 equipment (Flt 1990), leaving IAH at 1335 hours. Checking the schedule I don’t see any other days where CO has this same flight and equipment operating the same route. Also, I don’t see a schedule where the 752 is departing ONT back to IAH on 8/27. I guess it will be flown empty to LAX? Wonder why a special flight this day?