Just booked a couple of LAX <> BOS same day turns for $299 on AA. ~5.4 cpm. Well actually I paid $266 by using entertainment book $30 off coupons:
12/4:
LAX > BOS depart 6:50 AM arriving 3:10 PM
BOX > DFW depart 4:05 PM arriving 7:40 PM
DFW > BOX depart 8:40 PM Arriving 10:05 PM
5400 mi IRRC
12/10
LAX > JFK depart 6 AM Arriving 2:10 PM
JFK > BOS depart 3:59 PM arriving 5:14 PM
BOS > LAX depart 8:20 PM arriving 11:55 PM
5500 mi IIRC