Exactly. Make it "real time" for a trip leaving in a couple of hours, but as the trip gets farther out, increase the window before it is assigned until is is at least 24 hours. That protects those out flying. The order of assignment for those longer out there can be based on some other metric, starting with OTP, PMU, then maybe leveling/hours cap (my preference), seniority, inverse seniority, or some other parameter.