PQDs are different for outbound and inbound flights
The booking fares were identical for RIC-IND and IND-RIC flights. The connection cities were different (IAD vs. ORD). Yet, the PQD for IND-ORD-RIC was $19 higher than RIC-IAD-IND. The only explanation is the day of the week. The Friday fare is higher than Wednesday fare under an identical booking code. Happy travels.