Originally Posted by
mecabq
Funny!
I agree -- it doesn't matter. They're all the same -- choose on mileage program (which, under most circumstances, will be the same on these since DL and CO are partners), schedule, and fare.
CL and CO are partners, BUT... CO is the only "partner" on which one only earns .5 MQM per mile flown on cheap fares. On every other partner, its 1 MQM per mile flown on any paid fare. This is only relavent if the OP is a DL Skymiles member.
(
http://www.delta.com/skymiles/about_...sp#continental)