Originally Posted by xyzzy
What would happen if you did one trip on CO and the other on NW/DL/AS and credited the mileage to CO? Technically that wouldn't be breaking the rules, would it?
One of the major mistakes with back to back ticketing is when you try to credit the miles to the same airline.
The only way to do it is to credit the miles to different accounts, preferebly with non-partner airlines.
I would also recommend against checking into the PC in IAH if you are there while you are supposed to be in ORD.