Geoffm From United Kingdom, joined Feb 2004, 2111 posts, RR: 7 Reply 5, posted (9 years 3 weeks 3 hours ago) and read 2781 times:
LGW-IAH-EWR on CO
MAN-ORD-JFK on BD/UA (UA go to JFK, right?)
BRS-AMS-EWR on KL/CO
...etc, etc, etc...
You'd probably be better off by looking for the bonus miles rather than a couple of hundred here or there. CO, for example, had a deal recently with 1,000 extra miles per itinerary by flying in (I think) Spring, then 2,000 if you did it again, then more again.