Doesn't help too much - BWI-IND was via MDW for the longest time, with a cost structure that always was a few $ more than MDW (to account for the greater distance, avoid hidden city ticketing, I'd guess). When nonstop BWI-IND service started, the prices never fell to match similar nonstop route prices (e.g. CMH, SDF, BNA). WN to DCA and IAD (via MDW) is common-rated to BWI, so not much help. Thus, the effect in this instance is minimal and WAS-IND is generally still overpriced most of the time.