I would like to look at the F bucket on itn, but I am unable to locate my flights. I'm scheduled on March 19th, on NW8100 connecting to NW7881. These are in codeshare with CO. I have no problems finding the CO flights, but can't locate the NW codeshare flights. I need to find the NW flights because I booked this reservation with NW, and I've found that the F buckets differ on codeshare flights between NW and CO.