Look at San Diego to Boston runs thru DFW on AA in Feb-Apr at 4.4 cpm. Found this 2 day SAN-BOS run on Feb 7 for someone for work. Can also do a one day flight on Mar 4 or Mar 5 or Apr 23 for same, leaving SAN at 12:30pm and back 24 hours later at 11:45 am

Also, on Feb 27, Apr 9, Apr 17 Apr 24 you can leave at 6:20 am and back at 11:40 pm for a one day out and back into your bed that night.

SAN to BOS - Thu, Feb 7
American 1448 SAN-DFW Dep: 6:20AM Arr: 11:20AM -- Layover in DFW
American 1208 DFW-BOS Dep: 12:40PM Arr: 5:15PM

RETURN

BOS to SAN - Sat, Feb 9
American 2289 BOS-DFW Dep: 4:40PM Arr: 8:05PM -- Layover in DFW
American 403 DFW-SAN Dep: 10:00PM Arr: 11:10Pm

Cost per passenger (including taxes & fees) $241.60 5,450 miles