Transcon non-stops have been the most obvious deletions over the past year or so. BWI and PHL used to have one or two each to OAK and LAX. Presumably these routes were low-yield (not enough full fares sold) and the planes were redeployed.
Yes, that's correct! Because WN has been discontinuation some specific routes is: BWI-LAX, PHL-LAX, BWI-SJC, BWI-OAK, PHL-OAK, PHL-SAN, too. I know this mean WN has continuation transcon from BWI-SAN long as they can.