I am traveling on CO ticket with CO operated flights on the outbound, but NW operated flgihts on the retun. I want to check in for the outbound online for the CO bonus of 1000 miles, but due to the limited time that I will have, I want to check in for the return flights on NW metal later the same day using the NW kiosk located in the departure city airport prior to my departure on the outbound flights. Will this work?