Planning ahead rather than last minute...based on my current bookings, I still need 500 PQP by 12/31 to maintain Gold.

I could likely figure this out myself if I knew the tools that the experts use!

Departure Airport: WAS (IAD DCA BWI), but open to PHL or RIC
Miles (PQF/PQP/BIS, choose one) Needed: 500 PQP
Maximum Budget: inexpensive as possible of course
Available Travel Dates: flexible in August and September; same day turn is OK
Required Metal or Codeshares Okay: whatever needed to maximize PQP
Route(s) You've Already Searched: many out of WAS, but not an expert to maximize PQP