I was looking for a long way home from RDU in January, and stumbled upon this find out of RIC:

6Sep £1.50/TP US$457 240TPs RIC-CLT-DCA-BOS, BOS-LGA/PHL-CLT-RIC all I class aa.com

It's tough to find 6 segments in one day, however. Fare seems to be similar to BOS or to LGA as the destination. One-way 3-segment fares in either direction are much easier to find at US$232 for 120 TP.