Originally Posted by
GTITAN
I don't think that should be correct, but maybe life has changed. I have used NW miles several times to upgrade CO coded NW operated flights. It was MSP-LGW (MSP-IAH leg) of a few years back which seems to me is quite similar to the SEA-NRT flights currently at issue.
Safe Travels
IAH-SEA we were auto-upgraded as elites on a B fare, though there was/is availability to use miles for this portion as well (hmm, free or use miles???). Question is on the overwater segment specifically.
Has anyone recently successfully upgraded a Y or B fare using miles on a CO-ticketed, NW-operated flight?