In a rolling 30 day period, from 07/12/13 - 08/11/13, I flew:
MSP-SEA-NRT, HND-SEA-MSP-SFO-MSP-BOS-MSP-SFO-LAX-MEL-LAX-SLC-RST-MSP
for a total of 37,248 miles.
Highest actual month would be August of that year, flying:
MSP-SFO-LAX-MEL-LAX-SLC-RST-MSP-ATL-FCO-DTW-MSP-BOS
for a total of 31,674 miles.