You can do ATL-PDX on 12/16 for $530 in BE ($590 in MC) and get close to 5500 MQM's with the right routing. ATL-YYC 12/15-12/16 would be another option. Could do the rest on an ATL-DEN trip on the 18th (from $187).
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LBJ, thanks for great advice. I couldn't find the right connections for PDX, but did purchase a $587 on DL from ATL > LAX > YVR (Vancouver) > SEA > ATL that yielded 5,788 MQMs on 12/17. That combined with my 1,388 MQM trip next week gets me over the top with some room to spare. Only negative is that I have to take the SEA-ATL redeye home (and PE is sold out).