Programs: AA EXP, Amex Plat, SPG Gold, Hyatt Plat, Global Entry, National Exec, DL HM, UA TODer
AA/DL: BOS-SEA $257.20 AI, 4.1 cpm
DL: BOS-SEA $257.20 RT AI, 4.1 cpm
Best routing, as usually seems to be with DL, is through ATL both ways, a little over 6200 MQMs. Single connections only. Fare is only good from mid-September through the beginning of October, though same day turns are available on weekends at the end of September using the SEA-ATL redeye.
AA is also out there for just under $282 RT AI, via LAX both ways, 4.0 cpm using the AS LAX-SEA flights each way, but requires an overnight in SEA, and isn't available for weekend turns.
__________________ My Flight Memory Next destinations GIG, SIN, KUL, DFW, ANCx2, ICN